To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. 時間管理補.

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Activity Relationships Activity Relationship AOAAON Figure 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Activity Relationships Activity Relationship S precedes T, which precedes U. AOAAON 12 S 3 T 4 U STU Figure 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Activity Relationships Activity Relationship S and T must be completed before U can be started. AOAAON S T U 1 2 3 T S 4 U Figure 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Activity Relationships Activity Relationship T and U cannot begin until S has been completed. AOAAON T U S 3 4 1 T U 2 S Figure 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Activity Relationships Activity Relationship U and V cannot begin until both S and T have been completed. AOAAON 1 2 4 5 U V S T 3 S T U V Figure 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Activity Relationships Activity Relationship U cannot begin until both S and T have been completed; V cannot begin until T has been completed. AOAAON S T U V 13 Dummy 5 246 SU TV Figure 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Activity Relationships Activity Relationship T and U cannot begin until S has been completed; V cannot begin until both T and U have been completed. AOAAON 124 3 ST 5 V U Dummy STV U Figure 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff. BSelect site and do site survey. CSelect equipment. DPrepare final construction plans and layout. EBring utilities to the site. FInterview applicants and fill positions in nursing, support staff, maintenance, and security. GPurchase and take delivery of equipment. HConstruct the hospital. IDevelop an information system. JInstall the equipment. KTrain nurses and support staff. Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop an information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J AON Network Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AON Network Start A Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AON Network Start A B Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AON Network Start A B C Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AON Network Start A B C D Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AON Network Start A B C D E Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AON Network Start A B C D E F Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AON Network Start A B C D E F G Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AON Network Start A B C D E F G H Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AON Network Start A B C D E F G H I Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AON Network Start A B C D E F G H I J Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AON Network Start A B C D E F G H I J K Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital Example 18.1 AON Network FinishStart A B C D E F G H I J K Figure 18.2

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J AOA Network Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AOA Network A Start 1 2 Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AOA Network A B Start 1 2 4 Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AOA Network A B C D Start 1 2 3 5 4 Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AOA Network F A B C D H E G I Start 1 8 2 3 7 65 4 Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital AOA Network F A B C D H E G J I Start 1 8 2 3 7 65 4 Example 18.1

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J Example 18.1 AOA Network F A B C D H E G J I Dummy Start 1 8 2 3 7 65 4

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital Example 18.1 AOA Network F A B C D H E G K J I Finish 9 Dummy Start 1 8 2 3 7 65 4 Figure 18.3

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J Completion Time

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital Completion Time FinishStart K6K6 I 15 F 10 C 10 D 10 E 24 G 35 H 40 J4J4 A 12 B9B9 Figure 18.4

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital Completion Time FinishStart K6K6 I 15 F 10 C 10 D 10 E 24 G 35 H 40 J4J4 A 12 B9B9

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital Completion Time FinishStart K6K6 I 15 F 10 C 10 D 10 E 24 G 35 H 40 J4J4 A 12 B9B9 Expected PathTime A-F-K28 A-I-K33 A-C-G-J-K67 B-D-H-J-K69 B-E-J-K43

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Immediate ActivityDescriptionPredecessor(s) ASelect administrative and medical staff.— BSelect site and do site survey.— CSelect equipment.A DPrepare final construction plans and layout.B EBring utilities to the site.B FInterview applicants and fill positions in nursing, support staff, maintenance, and security.A GPurchase and take delivery of equipment.C HConstruct the hospital.D IDevelop and information system.A JInstall the equipment.E,G,H KTrain nurses and support staff.F,I,J St. Adolf’s Hospital FinishStart K6K6 I 15 F 10 C 10 D 10 E 24 G 35 H 40 J4J4 A 12 B9B9 Figure 18.5 Completion Time

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Earliest Start and Earliest Finish Times FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 I 15 F 10 Example 18.2

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Earliest Start and Earliest Finish Times FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 I 15 F 10 Earliest start time Example 18.2

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 Earliest Start and Earliest Finish Times Earliest start time Earliest finish time Example 18.2

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 0 9 Earliest Start and Earliest Finish Times Example 18.2

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 9 33 0 9 9 19 Earliest Start and Earliest Finish Times Example 18.2

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 9 33 0 9 9 19 12 22 Earliest Start and Earliest Finish Times Example 18.2

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 19 59 9 33 0 9 9 19 12 22 Earliest Start and Earliest Finish Times Example 18.2

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 22 57 19 59 9 33 0 9 9 19 12 22 Earliest Start and Earliest Finish Times Example 18.2

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 22 57 59 6319 59 9 33 0 9 9 19 12 22 Earliest Start and Earliest Finish Times Example 18.2

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 Earliest Start and Earliest Finish Times Figure 18.6 Critical path Earliest start time Earliest finish time

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 Latest Start and Latest Finish Times Example 18.3

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Latest Start and Latest Finish Times FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 63 69 Latest finish time Example 18.3

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Latest Start and Latest Finish Times FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 63 69 Latest start time Latest finish time Example 18.3

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 48 63 53 63 63 69 59 63 Latest Start and Latest Finish Times Example 18.3

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 48 63 53 63 63 69 24 59 19 59 35 59 59 63 Latest Start and Latest Finish Times Example 18.3

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 48 63 53 63 63 69 14 24 24 59 9 19 19 59 35 59 59 63 Latest Start and Latest Finish Times Example 18.3

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 48 63 2 14 53 63 63 69 14 24 24 59 0 9 9 19 19 59 35 59 59 63 Latest Start and Latest Finish Times Figure 18.7 Earliest start time Earliest finish time Latest start time Latest finish time Critical path

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 48 63 2 14 53 63 63 69 14 24 24 59 0 9 9 19 19 59 35 59 59 63 Activity Slack Analysis Example 18.4

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Activity Slack Analysis FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 48 63 2 14 53 63 63 69 14 24 24 59 0 9 9 19 19 59 35 59 59 63 Example 18.4 Activity Slack

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Activity Slack Analysis FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 48 63 2 14 53 63 63 69 14 24 24 59 0 9 9 19 19 59 35 59 59 63 Example 18.4 Activity Slack Slack = LS - ES or Slack = LF - EF

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Activity Slack Analysis FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 48 63 2 14 53 63 63 69 14 24 24 59 0 9 9 19 19 59 35 59 59 63 Example 18.4 Activity Slack Slack K = 63 - 63 or Slack K = 69 - 69

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Activity Slack Analysis FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 48 63 2 14 53 63 63 69 14 24 24 59 0 9 9 19 19 59 35 59 59 63 Example 18.4 Activity Slack Slack K = 0 or Slack K = 0

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Activity Slack Analysis FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 48 63 2 14 53 63 63 69 14 24 24 59 0 9 9 19 19 59 35 59 59 63 Example 18.4

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Activity Slack Analysis FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 48 63 2 14 53 63 63 69 14 24 24 59 0 9 9 19 19 59 35 59 59 63 Example 18.4 Node DurationESLS Slack

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Activity Slack Analysis FinishStart A 12 K6K6 C 10 G 35 J4J4 H 40 B9B9 D 10 E 24 0 12 I 15 F 10 12 27 12 22 63 69 22 57 59 6319 59 9 33 0 9 9 19 12 22 48 63 2 14 53 63 63 69 14 24 24 59 0 9 9 19 19 59 35 59 59 63 Example 18.4 Node DurationESLS Slack A12022 B9000 C1012142 D10990 E2493526 F10125341 G3522242 H4019190 I15124836 J459590 K663630

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Finish C 10 G 35 E 24 I 15 F 10 12 27 12 22 22 57 9 33 12 22 48 63 53 63 14 24 24 59 35 59 B9B9 0 9 D 10 9 19 H 40 19 59 J4J4 59 63 K6K6 63 69 Critical Path Node DurationESLS Slack A12022 B9000 C1012142 D10990 E2493526 F10125341 G3522242 H4019190 I15124836 J459590 K663630 Example 18.4

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Finish C 10 G 35 E 24 I 15 F 10 12 27 12 22 22 57 9 33 12 22 48 63 53 63 14 24 24 59 35 59 B9B9 0 9 D 10 9 19 H 40 19 59 J4J4 59 63 K6K6 63 69 Critical Path Figure 18.7 Start A 12 0 12 2 14

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Probabilistic Time Estimates Time Probability Figure 18.8

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Probabilistic Time Estimates Figure 18.8 (a) Mean mab Time

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Probabilistic Time Estimates Figure 18.8 (b) Mean Time abm 33 33 Area under curve between a and b is 99.74%

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital AF I CG Finish D E HBJ K Start Probabilistic Time Estimates Example 18.5

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Activity B Most OptimisticLikelyPessimistic (a)(m)(b) 7815 Probabilistic Time Estimates AF I CG Finish D E HBJ K Start Example 18.5

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Activity B Most OptimisticLikelyPessimistic (a)(m)(b) 7815 Probabilistic Time Estimates t e = = 9 weeks 7 + 4(8) + 15 6 AF I CG Finish D E HBJ K Start Example 18.5

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Activity B Most OptimisticLikelyPessimistic (a)(m)(b) 7815 Probabilistic Time Estimates t e = = 9 weeks 7 + 4(8) + 15 6  2 = = 1.78 ( ) 15 - 7 6 2 AF I CG Finish D E HBJ K Start Example 18.5

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Example 18.5 St. Adolf’s Hospital OptimisticLikelyPessimisticExpectedVariance Activity(a)(m)(b)Time (t e )(  2 ) Time Estimates (wk)Activity Statistics

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. Example 18.5 St. Adolf’s Hospital OptimisticLikelyPessimisticExpectedVariance Activity(a)(m)(b)Time (t e )(  2 ) Time Estimates (wk)Activity Statistics A111213120.11 B781591.78 C51015102.78 D8916101.78 E142530247.11 F6918104.00 G253641357.11 H354045402.78 I101328159.00 J121545.44 K56760.11

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Probabilities Critical Path = B - D - H - J - K T = 72 days T E = 69 days Example 18.6

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital  2 =  (variances of activities) z = T - T E  2 Probabilities Critical Path = B - D - H - J - K T = 72 days T E = 69 days Example 18.6

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital  2 =  (variances of activities) z = T - T E  2  2 = 1.78 + 1.78 + 2.78 + 5.44 + 0.11 = 11.89 Probabilities Critical Path = B - D - H - J - K T = 72 days T E = 69 days Example 18.6

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital  2 =  (variances of activities) z = T - T E  2  2 = 1.78 + 1.78 + 2.78 + 5.44 + 0.11 = 11.89 z = 72 - 69 11.89 Probabilities Critical Path = B - D - H - J - K T = 72 days T E = 69 days Example 18.6

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital  2 =  (variances of activities) z = T - T E  2  2 = 1.78 + 1.78 + 2.78 + 5.44 + 0.11 = 11.89 z = = 0.87 72 - 69 11.89 Probabilities Critical Path = B - D - H - J - K T = 72 days T E = 69 days Example 18.6

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital  2 =  (variances of activities) z = T - T E  2  2 = 1.78 + 1.78 + 2.78 + 5.44 + 0.11 = 11.89 z = = 0.87 72 - 69 11.89 Probabilities Critical Path = B - D - H - J - K T = 72 days T E = 69 days From Appendix 2 P z =.8078 .81 Example 18.6

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital  2 =  (variances of activities) z = T - T E  2  2 = 1.78 + 1.78 + 2.78 + 5.44 + 0.11 = 11.89 z = = 0.87 72 - 69 11.89 Probabilities Critical Path = B - D - H - J - K T = 72 days T E = 69 days Project duration (weeks) 6972 Probability of meeting the schedule is 0.8078 Length of critical path Normal distribution: Mean = 69 weeks;  = 3.45 weeks Probability of exceeding 72 weeks is 0.1922 Example 18.6 Figure 18.9

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital  2 =  (variances of activities) z = T - T E  2  2 = 0.11 + 2.78 + 7.11 + 5.44 + 0.11 = 15.55 z = = 1.27 72 - 67 15.55 Probabilities Path = A - C - G - J - K T = 72 days T E = 67 days From Appendix 2 P z =.8980 .90 Example 18.6

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital 8000 — 7000 — 6000 — 5000 — 4000 — 3000 — 0 — Direct cost (dollars) |||||| 567891011 Time (weeks) Figure 18.10 Cost-Time Relationships in Cost Analysis

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital 8000 — 7000 — 6000 — 5000 — 4000 — 3000 — 0 — Direct cost (dollars) Crash cost (CC) Normal cost (NC) |||||| 567891011 Time (weeks) (Crash time)(Normal time) Figure 18.10 Cost-Time Relationships in Cost Analysis

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital 8000 — 7000 — 6000 — 5000 — 4000 — 3000 — 0 — Direct cost (dollars) Crash cost (CC) Linear cost assumption Normal cost (NC) |||||| 567891011 Time (weeks) (Crash time)(Normal time) Figure 18.10 Cost-Time Relationships in Cost Analysis

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital 8000 — 7000 — 6000 — 5000 — 4000 — 3000 — 0 — Direct cost (dollars) 5200 Crash cost (CC) Linear cost assumption Normal cost (NC) Estimated costs for a 2-week reduction, from 10 weeks to 8 weeks |||||| 567891011 Time (weeks) (Crash time)(Normal time) Figure 18.10 Cost-Time Relationships in Cost Analysis

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Minimum-Cost Schedule A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Example 18.7

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Example 18.7 Minimum-Cost Schedule

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Path B-D-H-J-K: 69 weeks Crash Activity J by 3 weeks @ $1,000/week Example 18.7 Minimum-Cost Schedule

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Path B-D-H-J-K: 69 weeks Crash Activity J by 3 weeks @ $1,000/week 3($28,000) - 3($1,000) = $81,000 Example 18.7 Minimum-Cost Schedule

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Path B-D-H-J-K: 66 weeks Crash Activity J by 3 weeks @ $1,000/week 3($28,000) - 3($1,000) = $81,000 $2,624,000 - $81,000 = $2,543,000 Example 18.7 Minimum-Cost Schedule

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,543,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Path B-D-H-J-K: 66 weeks Crash Activity J by 3 weeks @ $1,000/week 3($28,000) - 3($1,000) = $81,000 $2,624,000 - $81,000 = $2,543,000 Example 18.7 Minimum-Cost Schedule

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Minimum Cost Schedule A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,543,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Path B-D-H-J-K: 69 weeks Crash Activity J by 3 weeks @ $1,000/week 3($28,000) - 3($1,000) = $81,000 $2,624,000 - $81,000 = $2,543,000 FinishStart A 12 C 10 G 35 E 24 0 12 I 15 F 10 12 27 12 22 22 57 9 33 12 22 48 63 2 14 53 63 14 24 24 59 35 59 0000 2 2 26 41 36 0 2 B9B9 0 9 D 10 9 19 H 40 19 59 J4J4 59 63 K6K6 63 69

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Minimum Cost Schedule A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,543,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Path B-D-H-J-K: 69 weeks Crash Activity J by 3 weeks @ $1,000/week 3($28,000) - 3($1,000) = $81,000 $2,624,000 - $81,000 = $2,543,000 FinishStart A 12 C 10 G 35 E 24 0 12 I 15 F 10 12 27 12 22 22 57 9 33 12 22 48 63 2 14 53 63 14 24 24 59 35 59 0000 2 2 26 41 36 0 2 B9B9 0 9 D 10 9 19 H 40 19 59 J1 60 59 60 K6K6 60 66

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,543,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Path B-D-H-J-K: 66 weeks Crash Activity D by 2 weeks @ $2,000/week Example 18.7 Minimum-Cost Schedule

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,543,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Path B-D-H-J-K: 66 weeks Crash Activity D by 2 weeks @ $2,000/week $28,000 + $8,000 - 2($2,000) = $32,000 $2,543,000 - $32,000 = $2,511,000 Example 18.7 Minimum-Cost Schedule

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,511,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Path B-D-H-J-K: 64 weeks Crash Activity D by 2 weeks @ $2,000/week $28,000 + $8,000 - 2($2,000) = $32,000 $2,543,000 - $32,000 = $2,511,000 Example 18.7 Minimum-Cost Schedule

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Minimum Cost Schedule A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,511,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Path B-D-H-J-K: 69 weeks Crash Activity D by 2 weeks @ $2,000/week $28,000 + $8,000 - 2($2,000) = $32,000 $2,543,000 - $32,000 = $2,511,000 FinishStart A 12 C 10 G 35 E 24 0 12 I 15 F 10 12 27 12 22 22 57 9 33 12 22 48 63 2 14 53 63 14 24 24 59 35 59 0000 2 2 26 41 36 0 2 B9B9 0 9 D 10 9 19 H 40 19 59 J1J1 59 60 K6K6 60 66

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Minimum Cost Schedule A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,511,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Path B-D-H-J-K: 69 weeks Crash Activity D by 2 weeks @ $2,000/week $28,000 + $8,000 - 2($2,000) = $32,000 $2,543,000 - $32,000 = $2,511,000 FinishStart A 12 C 10 G 35 E 24 0 12 I 15 F 10 12 27 12 22 22 57 9 33 12 22 48 63 2 14 53 63 14 24 24 59 35 59 0000 2 2 26 41 36 0 2 B9B9 0 9 D8 17 9 17 H 40 17 57 J1J1 57 58 K6K6 58 64

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Minimum Cost Schedule A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,511,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Path B-D-H-J-K: 69 weeks Crash Activity D by 2 weeks @ $2,000/week $28,000 + $8,000 - 2($2,000) = $32,000 $2,543,000 - $32,000 = $2,511,000 FinishStart A 12 C 10 G 35 E 24 0 12 I 15 F 10 12 27 12 22 22 57 9 33 12 22 48 63 12 0 12 53 63 12 22 22 57 35 59 0000 0 0 26 41 36 0 0 B9B9 0 9 D8 17 9 17 H 40 17 57 J1J1 57 58 K6K6 58 64

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,511,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Paths B-D-H-J-K and A-C-G-J-K: 64 weeks Crash Activity K by 1 week @ $4,000/week Example 18.7 Minimum-Cost Schedule

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,511,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Paths B-D-H-J-K and A-C-G-J-K: 64 weeks Crash Activity K by 1 week @ $4,000/week $8,000 - $4,000 = $4,000 $2,511,000 - $4,000 = $2,507,000 Example 18.7 Minimum-Cost Schedule

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,507,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Critical Paths B-D-H-J-K and A-C-G-J-K: 63 weeks Crash Activity K by 1 week @ $4,000/week $8,000 - $4,000 = $4,000 $2,511,000 - $4,000 = $2,507,000 Example 18.7 Minimum-Cost Schedule

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Critical Paths B-D-H-J-K and A-C-G-J-K: 64 weeks Crash Activity K by 1 week @ $4,000/week Minimum Cost Schedule A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,507,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 $8,000 - $4,000 = $4,000 $2,511,000 - $4,000 = $2,507,000

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Critical Paths B-D-H-J-K and A-C-G-J-K: 63 weeks Crash Activities B and C by 2 weeks @ $7,000/week and $600/week A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,507,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 Example 18.7 Minimum-Cost Schedule

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Critical Paths B-D-H-J-K and A-C-G-J-K: 63 weeks Crash Activities B and C by 2 weeks @ $7,000/week and $600/week A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,507,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 2($8,000) - 2($7,600) = $800 $2,507,000 - $800 = $2,506,200 Example 18.7 Minimum-Cost Schedule

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Critical Paths B-D-H-J-K and A-C-G-J-K: 61 weeks Crash Activities B and C by 2 weeks @ $7,000/week and $600/week A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,506,200 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 2($8,000) - 2($7,600) = $800 $2,507,000 - $800 = $2,506,200 Example 18.7 Minimum-Cost Schedule

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Critical Paths B-D-H-J-K and A-C-G-J-K: 63 weeks Crash Activities B and C by 2 weeks @ $7,000/week and $600/week Minimum Cost Schedule A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,507,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 2($8,000) - 2($7,600) = $800 $2,507,000 - $800 = $2,506,200

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. St. Adolf’s Hospital Critical Paths B-D-H-J-K and A-C-G-J-K: 63 weeks Crash Activities B and C by 2 weeks @ $8,000/week and $7,600/week Minimum Cost Schedule A-I-K:33 weeksB-D-H-J-K:69 weeks A-F-K:28 weeksB-E-J-K:43 weeks A-C-G-J-K:67 weeks Total cost = $2,624,000 $2,507,000 Indirect costs = $8,000/week Penalty cost = $20,000/week after week 65 2($8,000) - 2($7,600) = $800 $2,507,000 - $800 = $2,506,200

To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. 時間管理補.

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To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. 時間管理補.

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Presentation on theme: "To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Fifth Edition © 1999 Addison Wesley Longman. All rights reserved. 時間管理補."— Presentation transcript:

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