What Transaction to Perform Discontinued Parts in PP

In industry we need to replace on part by another material. this due to the following reason:

New safety regulations come into force on a certain date. Therefore, a specific component must be discontinued as it no longer complies with the safety regulations, or an expensive part is to be replaced by another cheaper part.

Therefore, the aim of the 'discontinued parts' procedure is to replace one component by another component at a certain point in time. This means that the dependent requirements for the current component are to be reassigned to another part (the follow-up
material), once you have exhausted the stocks of the current material.

The material that is to be discontinued must be defined as a part to be discontinued in the material master record.

Go to MM02 in MRP 4 view click on discontinued part checkbox.
Then entre the new material and date from which the new materil is to be taken in planning.

A distinction is made whether;
a) exactly one material is to be replaced by one follow-up material (simple discontinuation), or whether
b) a group of materials are to be replaced by another group of materials (parallel discontinuation)