Master Production Scheduling Procedure

Prerequisites

You have set an MRP type for master production scheduling in the material master (MRP 1 view).

You define MRP types in Customizing for MRP in the IMG activity Check MRP types.

You have entered a planning time fence.

You can define a planning time fence per material or you can also use the MRP group in the material master to assign a planning time fence to a material. The planning time fence that you assign manually has priority over the planning time fence in the MRP group.

The firming type, which you have defined in Customizing, determines whether the system is to create procurement proposals for material shortage in the planning time fence and how these procurement proposals are to be scheduled.

Process Flow

You start the total planning run for master schedule items or single-item planning for master schedule items.

In contrast to the MRP run, this planning run only plans the master schedule item level. The system creates dependent requirements for the BOM level directly below the planning level. However, this level and lower levels are not planned.

Depending on the settings of the MRP type, any changes to be made to the master plan are only proposed within the planning time fence. Outside of the planning time fence, procurement proposals are created as usual.

You use interactive planning to check the planning result and finely tune the master plan for the master schedule items. You hereby pay particular attention to planning and scheduling the procurement proposals that are required to cover shortages within the planning time fence.

Once the master plan has been finely tuned for the master schedule items, you start the total planning run for all dependent parts. Various options exist here:

You can start the planning run for all BOM levels directly from the total planning run for MPS. To do this, you set the indicator Process MRP materials in the initial screen of the total planning run for MPS. The system will only plan the other BOM levels if this indicator is set.
If you want to plan the total BOM structure for individual master schedule items only, you can work with the single-item, multi-level planning in the menu for MPS.

You evaluate the planning result using standard evaluations or user-specific evaluations.