Can anybody explain with an example as how to use the processing keys NETCH & NETPL in MRP run. I tried, but did not find any changes between these.  Or I am be wrong in using it.

There's a Planning File in SAP and in that file, materials with planning entries are listed.  According to those entries MRP decides whether or not to include a material in MRP run.

For a newly created material all entries are on. And after the first MRP run, material is planned and all entries are cleared for that material. Later in time, you execute transactions, which make changes to the material that changes the material's planning status (e.g. goods receipt for the material, creating planned orders for the material, and such..).

During these transactions, Planning File entries are updated accordingly. And next time you run MRP material is included in MRP, or not included if no changes have occurred which relates to the Planning File.

Difference between NETCH and NETPL are:

NETCH is any material that has undergone some changes since last MRP run. (e.g. you have created a new planned order for the material, so al other planning data has to be replanned according to this change)

NETPL is any material that has undergone some changes since last MRP run, and those changes are in the planning horizon. (e.g. you have created a planned order which is inside the planning horizon. If your planning horizon is 3 months, and you created planned order for a date 5 months from now, that material is not included in planning with NETPL)

Osman Karslioglu

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