Example: Setup Time
This example illustrates how the Scheduler applies setup time for three different
operations producing three different items.
Assume these conditions:
- There are three items, each with a single operation. All three
operations require the same resource:
- Adult Bike: Member of setup group Adults. Setup time 2.5 hours.
- Kids Bike, Blue: Member of setup group Kids. Setup time 0.5 hours.
- Kids Bike, Red: Member of setup group Kids. Setup time 1.5 hours.
- The Setup Matrix "Adults-to-Kids" determines setup time when the setup group changes as follows.
| From | To Adults | To Kids |
|---|---|---|
| <DEFAULT> | 5.0 | 6.0 |
| Adults | 0.2 | 1.0 |
| Kids | 2.0 | 0.3 |
Note: The "<DEFAULT>"
row accounts for the situation where there is no operation scheduled prior
to the current one.
The table below shows the Setup Rule and Setup Time rule for each operation and how the setup time is applied based on these rules. Items are listed in the sequence in which they arrive at the resource.
Setup/Setup Time Rules and Resulting Setup Time Application
| Field/Pair | Setting | Setting | Setting | Setting | Setting |
|---|---|---|---|---|---|
| Setup Rule: | Always | Basis | Basis | Always | Basis |
| Setup Basis: | Item | Item | Group | Group | Group |
| Setup Time Rule: | Fixed | Fixed | Fixed | Matrix | Matrix |
| Setup Matrix: | N/A | N/A | N/A | Adults-to-Kids | Adults-to-Kids |
| ¯ | ¯ | ¯ | ¯ | ¯ | |
| Kids Bike, Red | 1.5 | 1.5 | 1.5 | 6.0 | 6.0 |
| Kids Bike, Blue | 0.5 | 0.5 | 0 | 0.3 | 0 |
| Kids Bike, Blue | 0.5 | 0 | 0 | 0.3 | 0 |
| Adult Bike | 2.5 | 2.5 | 2.5 | 2.0 | 2.0 |
| Kids Bike, Blue | 0.5 | 0.5 | 0.5 | 1.0 | 1.0 |