2. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Chapter 17

3. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Gantt Charts Progress Chart Plymouth Ford Pontiac Job4/204/224/234/244/254/264/214/174/184/19 Figure 17.1 Key Start activity Finish activity Scheduled activity time Actual progress Nonproductive time

4. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Plymouth Ford Pontiac Job4/204/224/234/244/254/264/214/174/184/19 Gantt Charts Progress Chart Figure 17.1 Current date

5. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Gantt Charts Figure 17.2 Operating Rooms Chart Operating Room A Workstation 7am Operating Room B Operating Room C 12 noon 8am9am10am11am1pm2pm3pm4pm5pm6pmTime Dr. Jon Adams Dr. Aubrey Brothers Dr. Gary Case Dr. Jeff Dow Dr. Madeline Easton Dr. Dan GillespieDr. Jordanne Flowers

6. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Number of employees648910*32 Required employees Example 17.1

7. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Number of employees648910*32 Employee1 Required employees Example 17.1

8. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Number of employees648910*32 Employee1XXXXX Required employees Example 17.1

9. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Number of employees648910*32 Employee1XXXXX Requirement53789*32 Required employees Example 17.1

10. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Number of employees648910*32 Employee1XXXXX Requirement53789*32 Employee2XXXXX Required employees Example 17.1

11. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Number of employees648910*32 Employee1XXXXX Requirement53789*32 Employee2XXXXX Requirement42678*32 Required employees Example 17.1

12. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Number of employees648910*32 Employee1XXXXX Requirement53789*32 Employee2XXXXX Requirement42678*32 Employee3XXXXX Required employees Example 17.1

13. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Number of employees648910*32 Employee1XXXXX Requirement53789*32 Employee2XXXXX Requirement42678*32 Employee3XXXXX Requirement31567*32 Required employees Example 17.1

14. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Number of employees648910*32 Employee1XXXXX Requirement53789*32 Employee2XXXXX Requirement42678*32 Employee3XXXXX Requirement31567*32 Employee4XXXXX Required employees Example 17.1

15. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Number of employees648910*32 Employee1XXXXX Requirement53789*32 Employee2XXXXX Requirement42678*32 Employee3XXXXX Requirement31567*32 Employee4XXXXX Requirement31456*21 Required employees Example 17.1

16. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Number of employees648910*32 Employee1XXXXX Requirement53789*32 Employee2XXXXX Requirement42678*32 Employee3XXXXX Requirement31567*32 Employee4XXXXX Requirement31456*21 Employee5XXXXX Required employees Example 17.1

17. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Requirement20345*21 Required employees Example 17.1

18. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Requirement20345*21 Employee6XXXXX Required employees Example 17.1

19. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Requirement20345*21 Employee6XXXXX Requirement20234*10 Employee7XXXXX Required employees Example 17.1

20. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Requirement20345*21 Employee6XXXXX Requirement20234*10 Employee7XXXXX Requirement10123*10 Employee8XXXXX Required employees Example 17.1

21. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Requirement20345*21 Employee6XXXXX Requirement20234*10 Employee7XXXXX Requirement10123*10 Employee8XXXXX Requirement00012*10 Employee9XXXXX Required employees Example 17.1

22. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Requirement20345*21 Employee6XXXXX Requirement20234*10 Employee7XXXXX Requirement10123*10 Employee8XXXXX Requirement00012*10 Employee9XXXXX Requirement00001*00 Employee10XXXXX Required employees Example 17.1

23. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Employee1XXXXX offoff Employee2XXXXX offoff Employee3XXXXX offoff Employee4 offoff XXXXX Employee5XXXXX offoff Employee6 offoff XXXXX Employee7XXXXX offoff Employee8XXXXX offoff Employee9 off XXXXX off Employee10XXXXX offoff Final Schedule Example 17.1

24. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Employee1XXXXX offoff Employee2XXXXX offoff Employee3XXXXX offoff Employee4 offoff XXXXX Employee5XXXXX offoff Employee6 offoff XXXXX Employee7XXXXX offoff Employee8XXXXX offoff Employee9 off XXXXX off Employee10XXXXX offoff Final Schedule Example 17.1 DayMTWThFSSu TOTAL

25. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Employee1XXXXX offoff Employee2XXXXX offoff Employee3XXXXX offoff Employee4 offoff XXXXX Employee5XXXXX offoff Employee6 offoff XXXXX Employee7XXXXX offoff Employee8XXXXX offoff Employee9 off XXXXX off Employee10XXXXX offoff Final Schedule Example 17.1 DayMTWThFSSu TOTAL Capacity, C781010103250

26. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Employee1XXXXX offoff Employee2XXXXX offoff Employee3XXXXX offoff Employee4 offoff XXXXX Employee5XXXXX offoff Employee6 offoff XXXXX Employee7XXXXX offoff Employee8XXXXX offoff Employee9 off XXXXX off Employee10XXXXX offoff Final Schedule Example 17.1 DayMTWThFSSu TOTAL Capacity, C781010103250 Requirements, R6489103242

27. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Scheduling Services DayMTWThFSSu Employee1XXXXX offoff Employee2XXXXX offoff Employee3XXXXX offoff Employee4 offoff XXXXX Employee5XXXXX offoff Employee6 offoff XXXXX Employee7XXXXX offoff Employee8XXXXX offoff Employee9 off XXXXX off Employee10XXXXX offoff Final Schedule DayMTWThFSSu TOTAL Capacity, C781010103250 Requirements, R6489103242 Slack, C – R14210008 Example 17.1

28. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Shipping Department Manufacturing Process Figure 17.3 Raw Materials Legend: Batch of parts Workstation

29. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Dispatching Procedures  Critical ratio (CR) = (Due date – Today’s date)/Total shop time remaining  Earliest due date (EDD)  First come, first served (FCFS)  Shortest processing time (SPT)  Slack per remaining operations (S/RO) = ((Due date - Today’s date) – Total shop time remaining)/ Number of operations remaining

30. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Single-Dimension Rules – EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 Example 17.2 0+=8102 17+=323212 8+=14142 14+=17181 32+=444422

31. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Single-Dimension Rules – EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 Example 17.2 0+=8102 17+=323212 8+=14142 14+=17181 32+=444422 Average job flow time = 8 + 14 + 17 + 32 + 44 5

32. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Single-Dimension Rules – EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 Example 17.2 0+=8102 17+=323212 8+=14142 14+=17181 32+=444422 Average job flow time = 32 hours

33. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Average hours early = 2 + 0 + 1 + 0 + 0 5 Sequencing Single-Dimension Rules – EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 Example 17.2 0+=8102 17+=323212 8+=14142 14+=17181 32+=444422 Average job flow time = 32 hours

34. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Average hours early = 0.6 hour Sequencing Single-Dimension Rules – EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 Example 17.2 0+=8102 17+=323212 8+=14142 14+=17181 32+=444422 Average job flow time = 32 hours

35. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Average hours early = 0.6 hour Sequencing Single-Dimension Rules – EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 Example 17.2 0+=8102 17+=323212 8+=14142 14+=17181 32+=444422 Average job flow time = 32 hours Average hours past due = 0 + 2 + 0 + 12 + 22 5

36. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Average hours early = 0.6 hour Sequencing Single-Dimension Rules – EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 Example 17.2 0+=8102 17+=323212 8+=14142 14+=17181 32+=444422 Average job flow time = 32 hours Average hours past due = 7.2 hours

37. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Average hours early = 0.6 hour Sequencing Single-Dimension Rules – EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 Example 17.2 0+=8102 17+=323212 8+=14142 14+=17181 32+=444422 Average job flow time = 32 hours Average hours past due = 7.2 hours Average WIP = Sum of flow times Makespan

38. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Average hours early = 0.6 hour Sequencing Single-Dimension Rules – EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 Example 17.2 0+=8102 17+=323212 8+=14142 14+=17181 32+=444422 Average job flow time = 32 hours Average hours past due = 7.2 hours Average WIP = 8 + 14 + 17 + 32 + 44 44

39. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Average hours early = 0.6 hour Sequencing Single-Dimension Rules – EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 Example 17.2 0+=8102 17+=323212 8+=14142 14+=17181 32+=444422 Average job flow time = 32 hours Average hours past due = 7.2 hours Average WIP = 2.61 blocks

40. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Single-Dimension Rules – EDD Example 17.2 Average hours early = 0.6 hour JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 0+=8102 17+=323212 8+=14142 14+=17181 32+=444422 Average job flow time = 32 hours Average hours past due = 7.2 hours Average WIP = 2.61 blocks Average total inventory = Sum of time in system Makespan

41. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Single-Dimension Rules – EDD Example 17.2 Average hours early = 0.6 hour JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 0+=8102 17+=323212 8+=14142 14+=17181 32+=444422 Average job flow time = 32 hours Average hours past due = 7.2 hours Average WIP = 2.61 blocks Average total inventory = 10 + 14 + 18 + 32 + 44 44

42. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Single-Dimension Rules – EDD Example 17.2 Average hours early = 0.6 hour JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 0+=8102 17+=323212 8+=14142 14+=17181 32+=444422 Average job flow time = 32 hours Average hours past due = 7.2 hours Average WIP = 2.61 blocks Average total inventory = 2.68 engine blocks

43. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Single-Dimension Rules – SPT JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Econoline 150 0+3= 3181815 Explorer 3+6=912123 Ranger 6+8=1710177 Thunderbird 17+12=2922297 Bronco 29+15=44204424 Average job flow time = 20.4 hours Average hours early = 3.6 hour Average hours past due = 7.6 hours Average WIP = 2.32 blocks Average total inventory = 2.73 engine blocks Example 17.2

44. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Single-Dimension Rules – SPT JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Econoline 150 0+3= 3181815 Explorer 3+6=912123 Ranger 6+8=1710177 Thunderbird 17+12=2922297 Bronco 29+15=44204424 Average job flow time = 20.4 hours Average hours early = 3.6 hour Average hours past due = 7.6 hours Average WIP = 2.32 blocks Average total inventory = 2.73 engine blocks Example 17.2 Rule Comparison EDDSPT Average job flow time23.0020.40 Average hours early0.603.60 Average hours past due7.207.60 Average WIP2.612.32 Average total inventory2.682.73

45. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.1 210.51027.8 36.2201214.5 415.68510.2 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR = Time remaining to due date Shop time remaining

46. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.1 210.51027.8 36.2201214.5 415.68510.2 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR = 156.1

47. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.1 210.51027.8 36.2201214.5 415.68510.2 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR = = 2.46 156.1

48. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.46 210.51027.8 36.2201214.5 415.68510.2 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR = = 2.46 156.1

49. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.46 210.51027.81.28 36.2201214.51.38 415.68510.2.78 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3

50. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.46 210.51027.81.28 36.2201214.51.38 415.68510.2.78 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 S/RO = Time remaining to due date – Shop time remaining Number of operations remaining

51. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.46 210.51027.81.28 36.2201214.51.38 415.68510.2.78 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 S/RO = 15 – 6.1 10

52. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.46 210.51027.81.28 36.2201214.51.38 415.68510.2.78 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 S/RO = = 0.89 15 – 6.1 10

53. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.28 36.2201214.51.38 415.68510.2.78 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 S/RO = = 0.89 15 – 6.1 10

54. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3

55. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence=

56. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence= 4 CR Sequence=

57. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence= 4 – 2 CR Sequence=

58. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence= 4 – 2 – 3 CR Sequence=

59. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence= 4 – 2 – 3 – 1 CR Sequence=

60. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence= 4 – 2 – 3 – 1 S/RO Sequence= CR Sequence=

61. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence= 4 – 2 – 3 – 1 S/RO Sequence= 4 CR Sequence=

62. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence= 4 – 2 – 3 – 1 S/RO Sequence= 4 – 3 CR Sequence=

63. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence= 4 – 2 – 3 – 1 S/RO Sequence= 4 – 3 – 1 CR Sequence=

64. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence= 4 – 2 – 3 – 1 S/RO Sequence= 4 – 3 – 1 – 2 CR Sequence=

65. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence= 4 – 2 – 3 – 1 S/RO Sequence= 4 – 3 – 1 – 2 CR Sequence= Sequence Summary

66. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence= 4 – 2 – 3 – 1 S/RO Sequence= 4 – 3 – 1 – 2 CR Sequence= Sequence Summary FCFS=1 – 2 – 3 – 4

67. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence= 4 – 2 – 3 – 1 S/RO Sequence= 4 – 3 – 1 – 2 CR Sequence= Sequence Summary FCFS=1 – 2 – 3 – 4 SPT=1 – 3 – 2 – 4

68. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence= 4 – 2 – 3 – 1 S/RO Sequence= 4 – 3 – 1 – 2 CR Sequence= Sequence Summary FCFS=1 – 2 – 3 – 4 SPT=1 – 3 – 2 – 4 EDD=4 – 2 – 1 – 3

69. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.2.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.3 CR Sequence= 4 – 2 – 3 – 1 S/RO Sequence= 4 – 3 – 1 – 2 CR Sequence= Sequence Summary FCFS=1 – 2 – 3 – 4 SPT=1 – 3 – 2 – 4 EDD=4 – 2 – 1 – 3 Avg Flow Time 17.17516.10026.17527.15024.025 Avg Early Time 3.4256.050000 Avg Past Due 7.3508.90012.92513.90010.775 Avg WIP 1.9861.8613.0263.1292.777 Avg Total Inv 2.3822.5613.0263.1292.777 ShortestSlack per ProcessingEarliestCriticalRemaining FCFSTimeDue DateRatioOperation Priority Rule Summary

70. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Simulation Example 17.4 PRECISION AUTOBODY PROCESS TIMES TIME TO PERFORM 1.Frame straightening *82 2a.Body repair, major damage *164 2b.Body repair, minor damage *82 3.Paint preparation1 1 / 4 1 / 3 4.Paint application (two coats)1 1 / 2 1 / 2 6.Clean up3 1 / 2 OPERATIONAverage (hr)Standard Deviation * Not necessary for all vehicles

71. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Simulation Figure 17.4

72. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Simulation Figure 17.5

73. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Simulation Figure 17.6

74. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Example 17.5

75. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Example 17.5 Sequence =

76. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = Example 17.5

77. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M3 Example 17.5

78. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M3 Example 17.5

79. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M3 Example 17.5

80. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M3 Example 17.5

81. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M2M3 Example 17.5

82. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M2M3 Example 17.5

83. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M2M3 Example 17.5

84. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M2M3M5- Example 17.5

85. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M2M3M5- Example 17.5

86. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M5-- Example 17.5

87. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M5-- Example 17.5

88. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M4M5---- Example 17.5

89. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M4M5---- Example 17.5

90. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M4M5---- Workstation 051015202530 Day 35404550556065 2 1 Example 17.5

91. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M4M5---- Workstation M2 (4) M1 (12) M4 (15) M5 (10) M3 (5) Idle—available for further work 051015202530 Day 35404550556065 2 1 Example 17.5

92. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M4M5---- Workstation M2 (4) M1 (12) M4 (15) M5 (10) M3 (5) Idle—available for further work 051015202530 Day 35404550556065 2 1 Example 17.5

93. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M4M5---- Workstation M2 (4) M1 (12) M4 (15) M5 (10) M3 (5) Idle—available for further work 051015202530 Day 35404550556065 Idle2 1 Example 17.5

94. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M4M5---- Workstation M2 (4) M1 (12) M4 (15) M5 (10) M3 (5) Idle—available for further work 051015202530 Day 35404550556065 Idle2 M2 (5) 1 Example 17.5

95. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M4M5---- Workstation M2 (4) M1 (12) M4 (15) M5 (10) M3 (5) Idle—available for further work 051015202530 Day 35404550556065 Idle2 M2 (5) 1 Example 17.5

96. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M4M5---- Workstation M2 (4) M1 (12) M4 (15) M5 (10) M3 (5) Idle—available for further work 051015202530 Day 35404550556065 Idle2 M2 (5) Idle 1 Example 17.5

97. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M4M5---- Workstation M2 (4) M1 (12) M4 (15) M5 (10) M3 (5) Idle—available for further work 051015202530 Day 35404550556065 Idle2 M2 (5) M1 (22) Idle 1 Example 17.5

98. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M4M5---- Workstation M2 (4) M1 (12) M4 (15) M5 (10) M3 (5) Idle—available for further work 051015202530 Day 35404550556065 Idle2 M2 (5) M1 (22) M4 (16) Idle 1 Example 17.5

99. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M4M5---- Workstation M2 (4) M1 (12) M4 (15) M5 (10) M3 (5) Idle—available for further work 051015202530 Day 35404550556065 Idle2 M2 (5) M1 (22) M4 (16) M5 (8) Idle 1 Example 17.5

100. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M4M5---- Workstation M2 (4) M1 (12) M4 (15) M5 (10) M3 (5) Idle—available for further work 051015202530 Day 35404550556065 Idle2 M2 (5) M1 (22) M4 (16) M5 (8) M3 (3) Idle 1 Example 17.5

101. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = M1M2M3M4M5---- Workstation M2 (4) M1 (12) M4 (15) M5 (10) M3 (5) Idle—available for further work 051015202530 Day 35404550556065 Idle2 M2 (5) M1 (22) M4 (16) M5 (8) M3 (3) Idle 1 Figure 17.7

102. To Accompany Krajewski & Ritzman Operations Management: Strategy and Analysis, Seventh Edition © 2004 Prentice Hall, Inc. All rights reserved. Solved Problem 4 Figure 17.8 DredgeEHGFBJICDA IncinerateEHGFBJICDA Storage basin