Job & PS Supply Switching

This parameter applies only to the APS planning mode and only to manufactured items.

Select this field to allow the system to reallocate on-hand inventory and job/production schedule supplies to short-term demands that, during the APS Planning run, may have been satisfied by later job orders and production schedule releases. The system runs this process after each APS Planning run, in a "push" planning mode, starting from the current date/time.

Consider using this option if you typically create jobs or production schedule releases earlier than they are needed, and you are not concerned about reserving supply for new short-term demands using Get ATP/CTP. Instead, you want to allocate the job/production schedule supplies with the earliest due dates to satisfy the demands with the earliest due dates.

Note:  If you continue to use Get ATP/CTP when this parameter is selected, the Projected dates generated by Get ATP/CTP may be significantly later than expected, because more on-hand inventory and short-term supply will have been consumed by the longer-term demands.

If this parameter is selected, the system follows this process after the APS Planning activity runs:

  • Reads the output data and makes a list of the following "events" that occurred in the APS plan, sorted by the date/time in which they occurred:
    • Each demand's usage of inventory
    • Each demand's usage of a job or PS supply (MPS and transfer order supply usages are not included)
    • Each job or PS supply
  • For each supply-usage and inventory-usage event, the system takes these actions:
    • Calculates on-hand inventory remaining after satisfying earlier demands.
    • Calculates Job/PS supplies available before the date/time of the usage event.
    • Calculates Job/PS supplies available after the date/time of the usage event that can be moved in.
    • Uses on-hand inventory to satisfy the demand.
    • For any unsatisfied demand quantity, allocates the job/PS supplies that are due before the demand due date. These are the supplies remaining after satisfying earlier demands.
    • If any demand quantity remains unsatisfied, allocates the job/PS supplies that are due after the demand due date. Generates a "Move In Rcpt (Tol): YYYY-MM-DD" exception message if the demand is within Supply Usage Tolerance. If the demand is not within Supply Usage Tolerance, then a new planned order would be generated, if it could be completed sooner according to APS.
    • Checks for any jobs or PS releases that have not been used and generates "Receipt Not Needed" exception messages for them.
Note: 

The supply-switching process:

  • Does not affect how the system generates planned orders (PLNs).
  • Does not consider supplies from safety stock replenishment orders.
  • Does not reallocate cross-referenced jobs or production schedules.
  • Does not consider items with the MPS Flag field selected.
  • Does not consider items with the Phantom Flag selected.
  • Does not consider items with the Accept Requirements field cleared.
  • Considers Supply Usage Tolerance settings (if enabled), with a minimum tolerance of one day.
  • Considers Time Fences (if enabled). Keep in mind the Time Fence parameter is designed to preserve inventory for short-term demands. Selecting the Job and PS Supply Switching parameter may undo the inventory preservation accomplished by the Time Fence.