Preserve Pre-Released Production Dates

This field applies to APS.

Select this field to specify that APS should not move out a job or production schedule item's projected date to account for changes in the availability of material components. In effect, selecting this field removes the internal requirement that a firm job or planned production schedule must have a material on a bill of material before it can be completed (which can push out the projected date on the parent demand while the demand waits on the material). Therefore, when this field is selected, the projected date remains the same as the job or production schedule's end/due date.

Clear this field to allow APS to recalculate a projected date that is later than the end/due date, in the situation where the required material components become delayed. In this case, the system moves the demand's projected date out to account for the delay.

You should consider selecting this field if you expect the dates on firm jobs and planned production schedules to remain fixed. However, be aware that when lateness occurs, instead of automatically moving out the dates, you will need to deal with the lateness manually.

See the topic on How APS Interprets Job Status for more information about how this field affects when the demand consumes material components and when the job supply will be available.

For firm jobs with no routing/BOM and planned production schedule releases with no routing/BOM (whose PS item has no routing/BOM), this parameter affects whether the system considers any alternates present in the BOM (Preserve Pre-Released Production Dates = Not selected) or only uses the primary materials (Preserve Pre-Released Production Dates = Selected).

See the topic on Using Alternate Materials in a Bill of Material for more information.