How to create a BOM with components that do not generate needs?

Description: A BOM has been created where it has a large list of materials and some of them are used and others are not. Problem: the materials that are in excess in the BOM and can be used in the process orders generate needs by MRP and in APO.

What is expected: Define a BOM with many materials and those materials that were not used in the process order do not generate needs.

Because the BOM was defined in this way: to facilitate the user the use of the process order and not have to add the materials to the process order.