Understanding Master Schedules

You can generate a master schedule for a single item or all items. When you generate a master schedule, the system evaluates selected information, performs calculations, and recommends a time-phased planning schedule for all selected items. At a minimum, you should generate a master schedule weekly to keep the plan current.

DRP Regeneration and MPS Regeneration use versions of the MRP/MPS Requirements Planning program to produce a single-level DRP or MPS schedule for all items that meet the data selection criteria. The program:

• Reads the selected forecast and sales orders.

• Uses data from the DRP/MPS/MRP inclusion rules to calculate requirements for master planned items.

• Does not explode planned orders to the bill of material components.

The MRP Regeneration version of the MRP/MPS Requirements Planning program explodes planned orders for bill of material items to produce a multilevel material plan.

Before the program generates a schedule, it deletes the message and time series tables for the selected items.

When you set up the versions to generate a planning schedule, you should consider:

• Data selection: base the data selection on branch/plant, category codes (usually master planning family), and planning code.

  Any selection from based-on table fields can be processed.

• Data sequence: copy the data sequence from the report example.

  Do not change this sequence or unpredictable results might occur.