1. Penny Fab
WIP=1

2. The Penny Fab

3. The Penny Fab (WIP=1)
Time = 0 hours

4. The Penny Fab (WIP=1)
Time = 2 hours

5. The Penny Fab (WIP=1)
Time = 4 hours

6. The Penny Fab (WIP=1)
Time = 6 hours

7. The Penny Fab (WIP=1)
Time = 8 hours

8. The Penny Fab (WIP=1)
Time = 10 hours

9. The Penny Fab (WIP=1)
Time = 12 hours

10. The Penny Fab (WIP=1)
Time = 14 hours

11. The Penny Fab (WIP=1)
Time = 16 hours

12. Penny Fab Performance

13. Penny Fab
WIP=2

14. The Penny Fab (WIP=2)
Time = 0 hours

15. The Penny Fab (WIP=2)
Time = 2 hours

16. The Penny Fab (WIP=2)
Time = 4 hours

17. The Penny Fab (WIP=2)
Time = 6 hours

18. The Penny Fab (WIP=2)
Time = 8 hours

19. The Penny Fab (WIP=2)
Time = 10 hours

20. The Penny Fab (WIP=2)
Time = 12 hours

21. The Penny Fab (WIP=2)
Time = 14 hours

22. The Penny Fab (WIP=2)
Time = 16 hours

23. The Penny Fab (WIP=2)
Time = 18 hours

24. Penny Fab Performance

25. Penny Fab
WIP=4

26. The Penny Fab (WIP=4)
Time = 0 hours

27. The Penny Fab (WIP=4)
Time = 2 hours

28. The Penny Fab (WIP=4)
Time = 4 hours

29. The Penny Fab (WIP=4)
Time = 6 hours

30. The Penny Fab (WIP=4)
Time = 8 hours

31. The Penny Fab (WIP=4)
Time = 10 hours

32. The Penny Fab (WIP=4)
Time = 12 hours

33. The Penny Fab (WIP=4)
Time = 14 hours

34. Penny Fab Performance

35. Penny Fab
WIP=5

36. The Penny Fab (WIP=5)
Time = 0 hours

37. The Penny Fab (WIP=5)
Time = 2 hours

38. The Penny Fab (WIP=5)
Time = 4 hours

39. The Penny Fab (WIP=5)
Time = 6 hours

40. The Penny Fab (WIP=5)
Time = 8 hours

41. The Penny Fab (WIP=5)
Time = 10 hours

42. The Penny Fab (WIP=5)
Time = 12 hours

43. Penny Fab Performance

44. Penny Fab Two
2 hr
5 hr
3 hr
10 hr

45. Penny Fab Two 0.5 0.4 0.6 0.67 0.4 p/hr 20 hr 8 pennies
rb = ____________ T0 = ____________ W0 = ____________

46. Penny Fab Two Simulation (Time=0)2
2 hr
5 hr
3 hr
10 hr

47. Penny Fab Two Simulation (Time=2)7 4
2 hr
5 hr
3 hr
10 hr

48. Penny Fab Two Simulation (Time=4)7 6 9
2 hr
5 hr
3 hr
10 hr

49. Penny Fab Two Simulation (Time=6)7 8 9
2 hr
5 hr
3 hr
10 hr

50. Penny Fab Two Simulation (Time=7)17 12 8 9
2 hr
5 hr
3 hr
10 hr

51. Penny Fab Two Simulation (Time=8)17 12 10 9
2 hr
5 hr
3 hr
10 hr

52. Penny Fab Two Simulation (Time=9)17 19 12 10 14
2 hr
5 hr
3 hr
10 hr

53. Penny Fab Two Simulation (Time=10)17 19 12 12 14
2 hr
5 hr
3 hr
10 hr

54. Penny Fab Two Simulation (Time=12)17 19 17 22 14 14
2 hr
5 hr
3 hr
10 hr

55. Penny Fab Two Simulation (Time=14)17 19 17 22 16 19 24
2 hr
5 hr
3 hr
10 hr

56. Penny Fab Two Simulation (Time=16)17 19 17 22 19 24
2 hr
5 hr
3 hr
10 hr

57. Penny Fab Two Simulation (Time=17)27 19 22 22 20 19 24
2 hr
5 hr
3 hr
10 hr

58. Penny Fab Two Simulation (Time=19)27 29 22 22 20 24 24 22
2 hr
5 hr
3 hr
10 hr

59. Penny Fab Two Simulation (Time=20)27
Note: job will arrive at
bottleneck just in time
to prevent starvation. 29 22 22 22 24 24 22
2 hr
5 hr
3 hr
10 hr

60. Penny Fab Two Simulation (Time=22)27 29 27 32 25 24 24 24
2 hr
5 hr
3 hr
Note: job will arrive at
bottleneck just in time
to prevent starvation.
10 hr

61. Penny Fab Two Simulation (Time=24)27 29 27 32 25 29 34 27
2 hr
5 hr
3 hr
And so on….
Bottleneck will just
stay busy; all others
will starve periodically
10 hr

62. Worst Case
Observation: The Best Case yields the minimum cycle time and maximum throughput for each WIP level.
Question: What conditions would cause the maximum cycle time and minimum throughput?
Experiment:
set average process times same as Best Case (so rb and T0 unchanged)
follow a marked job through system
imagine marked job experiences maximum queueing

63. Worst Case Penny Fab
Time = 0 hours

64. Worst Case Penny Fab
Time = 8 hours

65. Worst Case Penny Fab
Time = 16 hours

66. Worst Case Penny Fab
Time = 24 hours