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Scheduling Manufacturing Process Shipping Department Raw Materials Legend: Batch of parts Workstation.

Published byReagan Constance Modified over 10 years ago

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Presentation on theme: "Scheduling Manufacturing Process Shipping Department Raw Materials Legend: Batch of parts Workstation."— Presentation transcript:

1

2 Scheduling

3 Manufacturing Process

4 Shipping Department Raw Materials Legend: Batch of parts Workstation

5 Manufacturing Process Shipping Department Raw Materials Legend: Batch of parts Workstation

6 Manufacturing Process Shipping Department Raw Materials Legend: Batch of parts Workstation

7 Manufacturing Process Shipping Department Raw Materials Legend: Batch of parts Workstation

8 Manufacturing Process Shipping Department Raw Materials Legend: Batch of parts Workstation

9 Manufacturing Process Shipping Department Raw Materials Legend: Batch of parts Workstation

10 Manufacturing Process Shipping Department Raw Materials Legend: Batch of parts Workstation

11 Gantt Charts

12 Progress Chart Plymouth Ford Pontiac Job4/204/224/234/244/254/264/214/174/184/19 Figure 17.2

13 Gantt Charts Progress Chart Plymouth Ford Pontiac Job4/204/224/234/244/254/264/214/174/184/19 Figure 17.2

14 Gantt Charts Progress Chart Plymouth Ford Pontiac Job4/204/224/234/244/254/264/214/174/184/19 Figure 17.2

15 Gantt Charts Progress Chart Plymouth Ford Pontiac Job4/204/224/234/244/254/264/214/174/184/19 Current date Figure 17.2

16 Gantt Charts Machine Chart Machine4/204/224/234/244/254/264/21 Grinder Lathe Figure 17.3

17 Gantt Charts Machine Chart Machine4/204/224/234/244/254/26 PlymouthPontiacFord PlymouthPontiacFord 4/21 Grinder Lathe Figure 17.3

18 Gantt Charts Machine Chart Machine4/204/224/234/244/254/26 PlymouthPontiacFord PlymouthPontiacFord 4/21 Grinder Lathe Figure 17.3

19 Current date Machine4/204/224/234/244/254/26 Grinder Lathe PlymouthPontiacFord PlymouthPontiacFord 4/21 Gantt Charts Machine Chart Figure 17.3

20 Performance Measures  Job flow time = Time of completion - Time job was available for first processing  Makespan = Time of completion of last job - Starting time of first job  Past due  Work-in-process inventory  Total inventory = Scheduled receipts for all items + On-hand inventories of all items  Utilization = Productive work time/Total work time available

21 Dispatching Procedures - Static  Earliest due date (EDD)  First come, first served (FCFS)  Last come, first served (LCFS)  Shortest processing time (SPT)

22  Critical ratio ( CR ) (Due date - Today’s date) / Total shop time remaining Slack time remaining (STR) Time to due date - Total shop time remaining Slack per remaining operations (STR/OP) STR / Number of operations remaining Dispatching Procedures - Dynamic

23 Sequencing Single-Dimension Rules

24 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 Example 17.1

25 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 Example 17.1

26 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 612 Econoline 150 318 Bronco 1520 Thunderbird 1222 Example 17.1

27 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 318 Bronco 1520 Thunderbird 1222 Example 17.1

28 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 1520 Thunderbird 1222 Example 17.1

29 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 17+15=32203212 Thunderbird 1222 Example 17.1

30 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 17+15=32203212 Thunderbird 32+12=44224422 Example 17.1

31 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 17+15=32203212 Thunderbird 32+12=44224422 Average job flow time = 8 + 14 + 17 + 32 + 44 5 Example 17.1

32 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 17+15=32203212 Thunderbird 32+12=44224422 Average job flow time = 23 hours Example 17.1

33 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 17+15=32203212 Thunderbird 32+12=44224422 Average job flow time = 23 hoursAverage hours early = 2 + 0 + 1 + 0 + 0 5 Example 17.1

34 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 17+15=32203212 Thunderbird 32+12=44224422 Average job flow time = 23 hoursAverage hours early = 0.6 hour Example 17.1

35 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 17+15=32203212 Thunderbird 32+12=44224422 Average job flow time = 23 hoursAverage hours early = 0.6 hour Average hours past due = 0 + 2 + 0 + 12 + 22 5 Example 17.1

36 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 17+15=32203212 Thunderbird 32+12=44224422 Average job flow time = 23 hoursAverage hours early = 0.6 hour Average hours past due = 7.2 hours Example 17.1

37 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 17+15=32203212 Thunderbird 32+12=44224422 Average job flow time = 23 hoursAverage hours early = 0.6 hour Average hours past due = 7.2 hoursAverage WIP = Sum of flow times Makespan Example 17.1

38 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 17+15=32203212 Thunderbird 32+12=44224422 Average job flow time = 23 hoursAverage hours early = 0.6 hour Average hours past due = 7.2 hoursAverage WIP = 8 + 14 + 17 + 32 + 44 44 Example 17.1

39 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 17+15=32203212 Thunderbird 32+12=44224422 Average job flow time = 23 hoursAverage hours early = 0.6 hour Average hours past due = 7.2 hoursAverage WIP = 2.61 blocks Example 17.1

40 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 17+15=32203212 Thunderbird 32+12=44224422 Average job flow time = 23 hoursAverage hours early = 0.6 hour Average hours past due = 7.2 hoursAverage WIP = 2.61 blocks Average total inventory = Sum of time in system Makespan Example 17.1

41 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 17+15=32203212 Thunderbird 32+12=44224422 Average job flow time = 23 hoursAverage hours early = 0.6 hour Average hours past due = 7.2 hoursAverage WIP = 2.61 blocks Average total inventory = 10 + 14 + 18 + 32 + 44 44 Example 17.1

42 Sequencing Single-Dimension Rules - EDD JobScheduledActual EngineProcessingFlowCustomerCustomerHours BlockBeginTimeTimePickupPickupHoursPast SequenceWork(hr)(hr)TimeTimeEarlyDue Ranger 0+8=810102 Explorer 8+6=1412142 Econoline 150 14+3=1718181 Bronco 17+15=32203212 Thunderbird 32+12=44224422 Average job flow time = 23 hoursAverage hours early = 0.6 hour Average hours past due = 7.2 hoursAverage WIP = 2.61 blocks Average total inventory = 2.68 engine blocks Example 17.1

43 Sequencing Single-Dimension Rules - SPT Example 17.1

44 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 hoursAverage hours early = 3.6 hour Average hours past due = 7.6 hoursAverage WIP = 2.32 blocks Average total inventory = 2.73 engine blocks Example 17.1

45 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 hoursAverage hours early = 3.6 hour Average hours past due = 7.6 hoursAverage WIP = 2.32 blocks Average total inventory = 2.73 engine blocks Rule Comparison EDDSPT Average job flow time2320.4 Average hours early0.63.6 Average hours past due7.27.6 Average WIP2.612.32 Average total inventory2.682.73 Example 17.1

46 Sequencing Multiple-Dimension Rules

47 Sequencing 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 17.2

48 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 CR = Time remaining to due date Shop time remaining Example 17.2

49 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 CR = 15 6.1 Example 17.2

50 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 CR = = 2.46 15 6.1 Example 17.2

51 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 CR = = 2.46 15 6.1 Example 17.2

52 Sequencing Multiple-Dimension Rules 12.315106.12.46 210.51027.81.28 36.2201214.51.38 415.68510.20.78 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.2

53 Sequencing Multiple-Dimension Rules 12.315106.12.46 210.51027.81.28 36.2201214.51.38 415.68510.20.78 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO S/RO = Time remaining to due date - Shop time remaining Number of operations remaining Example 17.2

54 Sequencing Multiple-Dimension Rules 12.315106.12.46 210.51027.81.28 36.2201214.51.38 415.68510.20.78 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO S/RO = 15 - 6.1 10 Example 17.2

55 Sequencing Multiple-Dimension Rules 12.315106.12.46 210.51027.81.28 36.2201214.51.38 415.68510.20.78 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO S/RO = = 0.89 15 - 6.1 10 Example 17.2

56 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.28 36.2201214.51.38 415.68510.20.78 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO S/RO = = 0.89 15 - 6.1 10 Example 17.2

57 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example 17.2

58 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= Example 17.2

59 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 Example 17.2

60 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 - 2 Example 17.2

61 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 - 2 - 3 Example 17.2

62 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 - 2 - 3 - 1 Example 17.2

63 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 - 2 - 3 - 1 S/RO Sequence= Example 17.2

64 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 - 2 - 3 - 1 S/RO Sequence= 4 Example 17.2

65 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 - 2 - 3 - 1 S/RO Sequence= 4 - 3 Example 17.2

66 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 - 2 - 3 - 1 S/RO Sequence= 4 - 3 - 1 Example 17.2

67 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 - 2 - 3 - 1 S/RO Sequence= 4 - 3 - 1 - 2 Example 17.2

68 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 - 2 - 3 - 1 S/RO Sequence= 4 - 3 - 1 - 2 Sequence Summary Example 17.2

69 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 - 2 - 3 - 1 S/RO Sequence= 4 - 3 - 1 - 2 Sequence Summary FCFS=1 - 2 - 3 - 4 Example 17.2

70 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 - 2 - 3 - 1 S/RO Sequence= 4 - 3 - 1 - 2 Sequence Summary FCFS=1 - 2 - 3 - 4 SPT=1 - 3 - 2 - 4 Example 17.2

71 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 - 2 - 3 - 1 S/RO Sequence= 4 - 3 - 1 - 2 Sequence Summary FCFS=1 - 2 - 3 - 4 SPT=1 - 3 - 2 - 4 EDD=4 - 2 - 1 - 3 Example 17.2

72 Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 - 2 - 3 - 1 S/RO Sequence= 4 - 3 - 1 - 2 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 Example 17.2

73 Sequencing Johnson’s Rule

74 Sequencing Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Example 17.3

75 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = Example 17.3

76 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = Example 17.3

77 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M3 Example 17.3

78 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M3 Example 17.3

79 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M3 Example 17.3

80 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M3 Example 17.3

81 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M2M3 Example 17.3

82 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M2M3 Example 17.3

83 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M2M3 Example 17.3

84 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M2M3M5- Example 17.3

85 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M2M3M5- Example 17.3

86 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M1M2M3M5-- Example 17.3

87 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M1M2M3M5-- Example 17.3

88 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M1M2M3M4M5---- Example 17.3

89 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M1M2M3M4M5---- Example 17.3

90 Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M1M2M3M4M5---- Workstation 051015202530 Day 35404550556065 2 1 Example 17.3

91 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 17.3

92 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 17.3

93 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 17.3

94 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 17.3

95 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 17.3

96 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 17.3

97 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 17.3

98 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 17.3

99 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 17.3

100 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 17.3

101 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 17.3

102 Theory of Constraints  Identify the system bottleneck(s)  Exploit the bottleneck(s)  Subordinate all other decisions to step 2  Elevate the bottleneck(s)  Don’t let inertia set in

103 Scheduling Services

104 DayMTWThFSSu Number of employees64891032 Required employees Example 17.4

105 Scheduling Services DayMTWThFSSu Number of employees64891032 Employee1 Required employees Example 17.4

106 Scheduling Services DayMTWThFSSu Number of employees64891032 Employee1XXXXX Required employees Example 17.4

107 Scheduling Services DayMTWThFSSu Number of employees64891032 Employee1XXXXX Requirement5378932 Required employees Example 17.4

108 Scheduling Services DayMTWThFSSu Number of employees64891032 Employee1XXXXX Requirement5378932 Employee2XXXXX Required employees Example 17.4

109 Scheduling Services DayMTWThFSSu Number of employees64891032 Employee1XXXXX Requirement5378932 Employee2XXXXX Requirement4267832 Required employees Example 17.4

110 Scheduling Services DayMTWThFSSu Number of employees64891032 Employee1XXXXX Requirement5378932 Employee2XXXXX Requirement4267832 Employee3XXXXX Required employees Example 17.4

111 Scheduling Services DayMTWThFSSu Number of employees64891032 Employee1XXXXX Requirement5378932 Employee2XXXXX Requirement4267832 Employee3XXXXX Requirement3156732 Required employees Example 17.4

112 Scheduling Services DayMTWThFSSu Number of employees64891032 Employee1XXXXX Requirement5378932 Employee2XXXXX Requirement4267832 Employee3XXXXX Requirement3156732 Employee4XXXXX Required employees Example 17.4

113 Scheduling Services DayMTWThFSSu Number of employees64891032 Employee1XXXXX Requirement5378932 Employee2XXXXX Requirement4267832 Employee3XXXXX Requirement3156732 Employee4XXXXX Requirement3145621 Required employees Example 17.4

114 Scheduling Services DayMTWThFSSu Number of employees64891032 Employee1XXXXX Requirement5378932 Employee2XXXXX Requirement4267832 Employee3XXXXX Requirement3156732 Employee4XXXXX Requirement3145621 Employee5XXXXX Required employees Example 17.4

115 Scheduling Services DayMTWThFSSu Requirement2034521 Required employees Example 17.4

116 Scheduling Services DayMTWThFSSu Requirement2034521 Employee6XXXXX Required employees Example 17.4

117 Scheduling Services DayMTWThFSSu Requirement2034521 Employee6XXXXX Requirement2023410 Employee7XXXXX Required employees Example 17.4

118 Scheduling Services DayMTWThFSSu Requirement2034521 Employee6XXXXX Requirement2023410 Employee7XXXXX Requirement1012310 Employee8XXXXX Required employees Example 17.4

119 Scheduling Services DayMTWThFSSu Requirement2034521 Employee6XXXXX Requirement2023410 Employee7XXXXX Requirement1012310 Employee8XXXXX Requirement0001210 Employee9XXXXX Required employees Example 17.4

120 Scheduling Services DayMTWThFSSu Requirement2034521 Employee6XXXXX Requirement2023410 Employee7XXXXX Requirement1012310 Employee8XXXXX Requirement0001210 Employee9XXXXX Requirement0000100 Employee10XXXXX Required employees Example 17.4

121 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 17.4

122 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 Example 17.4

123 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 Capacity, C7710101032 Example 17.4

124 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 Capacity, C7710101032 Requirements, R64891032 Example 17.4

125 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 Capacity, C7710101032 Requirements, R64891032 Slack, C - R1321000 Example 17.4

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