MFG/PRO 9.0 User Guide Volume 3: Manufacturing - QAD.com

the average order quantity, the less likely it is that these dates will be
realistic or reasonable.
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.
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 Table 6.7, 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.
WORK ORDERS 105
Table 6.7
Operation Lead
Time with Multiple
Components
Ï See “Executing
CRP” on
page 258 for
more details.