 |
Let's go back to the exercise we previously developed in this manual. Let's now in
the same example introduce a set up of 120' on the constraint resource D
(was 0').
Table 8.5.1. shows what orders will be too late and how many hours too late. |
| Order |
Qty |
Due Hour |
Start time |
Run time |
Finish time |
Late in hours |
Too late |
| 1 |
75 |
24 |
2 |
15 |
17 |
(7) |
|
| 6 |
50 |
24 |
19 |
10 |
29 |
5 |
Y |
| 4 |
40 |
32 |
31 |
8 |
39 |
7 |
Y |
| 5 |
80 |
40 |
41 |
16 |
57 |
17 |
Y |
| 3 |
30 |
48 |
59 |
6 |
65 |
17 |
Y |
| 2 |
60 |
48 |
67 |
12 |
79 |
31 |
Y | ;
|
Table 8.5.1 Combining Set Ups |
Let's suppose now order 2 to be delivered at hour 48 is exactly the same product as order 1 and the foreman
decides to save a set up. Table 8.4 shows the effects of this decision.
| Order |
Qty |
Due Hour |
Start time |
Run time |
Finish time |
Late in hours |
Too late |
| 1 |
75 |
24 |
2 |
15 |
17 |
(7) |
|
| 2 |
60 |
48 |
17 |
12 |
29 |
(17) |
|
| 6 |
50 |
24 |
31 |
10 |
41 |
17 |
Y |
| 4 |
40 |
32 |
43 |
8 |
51 |
19 |
Y |
| 5 |
80 |
40 |
53 |
16 |
69 |
29 |
Y |
| 3 |
30 |
48 |
71 |
6 |
77 |
29 |
Y |
|
Table 8.5.2 Combining Set Ups |
This example shows very clearly in what an uncontrollable situation regarding
lead time we will arrive, when saving set ups are allowed. |
