2. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Supplement J Operations Scheduling

3. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Learning Objectives Be Able To Apply Concepts Listed In Learning Goals Be Able To Use Formulas Listed In The Equation Summary of Chapter

4. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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

5. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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

6. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 J.1

7. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

8. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

9. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

10. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

11. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

12. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

13. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

14. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

15. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

16. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

17. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

18. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

19. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

20. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

21. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

22. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

23. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

24. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.1

25. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Single-Dimension Rules—SPT Example J.1

26. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 9+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 J.1

27. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 9+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 time23.0020.40 Average hours early0.603.60 Average hours past due7.207.60 Average WIP2.612.32 Average total inventory2.682.73 Example J.1

28. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 J.2

29. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 CR = Time remaining to due date Shop time remaining Example J.2

30. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 CR = 15 6.1 Example J.2

31. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 CR = = 2.46 15 6.1 Example J.2

32. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 CR = = 2.46 15 6.1 Example J.2

33. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.2

34. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.2

35. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.2

36. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. 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 J.2

37. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.28 36.2201214.51.38 415.68510.20.78 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO S/RO = = 0.89 15 – 6.1 10 Example J.2

38. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO Example J.2

39. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= Example J.2

40. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 Example J.2

41. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 – 2 Example J.2

42. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 – 2 – 3 Example J.2

43. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78– 0.44 OperationTime Time atRemainingNumber of Engineto Due DateOperationsShop Time JobLathe (hr)(Days)RemainingRemainingCRS/RO CR Sequence= 4 – 2 – 3 – 1 Example J.2

44. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78– 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 J.2

45. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78– 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 J.2

46. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78– 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 J.2

47. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78 – 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 J.2

48. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78– 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 J.2

49. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78– 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 J.2

50. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78– 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 J.2

51. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78– 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 J.2

52. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78– 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 J.2

53. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Multiple-Dimension Rules 12.315106.12.460.89 210.51027.81.281.10 36.2201214.51.380.46 415.68510.20.78- 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 J.2

54. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Example J.3

55. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = Example J.3

56. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence = Example J.3

57. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M3 Example J.3

58. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M3 Example J.3

59. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M3 Example J.3

60. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M3 Example J.3

61. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M2M3 Example J.3

62. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M2M3 Example J.3

63. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M2M3 Example J.3

64. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M2M3M5- Example J.3

65. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M2M3M5- Example J.3

66. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M1M2M3M5-- Example J.3

67. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M1M2M3M5-- Example J.3

68. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M1M2M3M4M5---- Example J.3

69. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Sequencing Johnson’s Rule Time (hr) MotorWorkstation 1Workstation 2 M11222 M245 M353 M41516 M5108 Sequence =M1M2M3M4M5---- Example J.3

70. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 J.3

71. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 J.3

72. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 J.3

73. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 J.3

74. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 J.3

75. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 J.3

76. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 J.3

77. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 J.3

78. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 J.3

79. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 J.3

80. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 J.3

81. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 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 J.3

82. To Accompany Ritzman & Krajewski Foundations of Operations Management, © 2003 Prentice Hall, Inc. All rights reserved. Linking Operations Scheduling to the Supply Chain Demand Planning Demand Planning Supply Network Planning Supply Network Planning Available-to-Promise Available-to-Promise Manufacturing Scheduling Manufacturing Scheduling