Std BPCS Capacity Generation 'finite' schedules individual Shop Orders but 'infinite' schedules multiple Shop Orders. This means that the WC capacity is used to schedule a specific SO. If the WC capacity is 8 hours/day and the calculation for SO 1 (based on the routing) requires 16 hours, SO 1 will be scheduled over 2 days (call it day 1 and day 2). However, if SO 2 also requires 16 hours, while it will schedule it over 2 days - it could be the same 2 days as SO 1 (i.e. day 1 and day 2). While it's smart enough to know that there are really 4 days required to get these 2 SOs done, it doesn't 'decide' on its own which one comes first and which one comes second - you do that by rescheduling as a result of reviewing std system reports / inquiries or writing some custom queries or reports that help you analyze this info.
There is a program called Finite Forward Scheduling (MRP640) that folks have had some success with. I used it at a client who is on ERP LX with success - can't comment on its success at earlier versions.
PHOENIX Business Consulting, Inc.
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