Work Orders > Scheduling Work Orders > Scheduling Operations
  
Scheduling Operations
The distinction between setup and run time is important when more than one machine is used to perform an operation.
Example: Each machine takes four hours to perform an operation on 100 units and each requires an hour of setup time.

Operation Lead Time with Multiple Components
 
 
 
Setup
Run
Packaging
Inspection
One Machine
 
1 hour
8 hours
16 hours
8 hours
 
 
 
 
 
 
Two Machines
 
1 hour
4 hours
16 hours
8 hours
 
 
1 hour
4 hours
 
 
In Operation Lead Time with Multiple Components, if you decide to make 200 units with one machine, it takes nine hours (setup plus run). If you then decide to use two machines, it takes five hours for each machine, because the setup time is the same for each, but the run time is halved.
Some adjustments may be necessary when operations overlap. This occurs when some units proceed from one operation to the next before all units for that operation are complete. This reduces the aggregate lead time for completing multiple operations. Specify the number of overlap units in Routing Maintenance (14.13.1).
Rescheduling Operations
If you modify the operation start and end dates, changes are reflected on CRP and work order dispatch reports. However, executing Recalculate Capacity Plan (24.1) will return the schedule to the original dates.
To prevent this, do not recalculate Exploded, Allocated, or Released orders. You can also modify the queue or wait time for the operation, rather than its start date.
See Executing CRP for more details.