MRP Planning Run Types

There are three different planning run types:

• Regenerative planning

• Net change planning

• Net change planning in the planning horizon

During regenerative planning all materials are planned for a plant. This makes sense when you are carrying out the planning run for the first time as well as later during production if data consistency cannot be guaranteed due to technical error. The disadvantage of regenerative planning is the fact that the system has to deal with high capacity loads because all materials are planned including those materials which will not be affected by the planning run.

To overcome this disadvantage, it makes sense during production to carry out the planning run using the net change planning procedure. In net change planning, the only materials which are included in the planning run are those which have undergone a change relevant to MRP since the last planning run, for example because of warehouse issues or sales orders. The net change planning procedure makes it possible for you to carry out the planning run in short intervals, for example in daily intervals. This means that you are always working with the most up-to-date planning result.

If the settings of an MRP type or a lot-sizing procedure are changed in Customizing, the system no longer keeps a record about where the indicator was set. This means that the materials effected by the change are not planned in the net change planning run. To enable the changes made to take effect, choose regenerative planning or make an entry manually in the planning file.

Net change planning in the planning horizon is another version of net change planning which shortens the planning run even further. With this version, MRP is only carried out within a defined planning horizon. Changes outside the planning horizon are not taken into account. This means that only those materials are planned which have undergone a change relevant to planning within the planning horizon. To plan the changes outside the planning horizon, you must carry out a net change planning run over the entire planning period in larger time intervals.

The planning horizon is set in Customizing.

In single-item planning, you can only determine whether net change planning is carried out, or whether net change planning is carried out in the planning horizon.

• Reactivation of MRP Planning Data
• Creation Indicator for MRP Planning Lists
• Creation Indicator for Purchase Requisitions MRP P...
• MRP Planning Run Types
• Single-Item or Total MRP Planning
• Things to Think About When Carrying Out the MRP Pl...
• Carrying Out the MRP Planning Run Overview