Preemption Process Example

In this example, a Gear may be preempted in its occupancy of the Lathe. This preemption may be because of either a preempting entity or downtime. Before the actual preemption takes place, the operation time for the Gear is interrupted and the Gear immediately begins processing the operation logic defined in the preemption process.

In the preemption process, the remaining operation time is stored in Attr1. The Gear routes to Lathe_Backup where it finishes processing. Because the backup lathe is not as efficient as the other Lathe, it takes 50% longer to process the Gear on Lathe_Backup. Therefore, we multiply the time left to process the Gear by a factor of 1.5.

Process Table

Routing Table