PM Assemblies
You can only set the PM assembly indicator if the item is defined as relevant to Plant Maintenance (PM).
Items which have the PM assembly indicator are displayed as structure elements of an engineering system when you process maintenance tasks. You can use these structure elements to describe an item in more detail in the engineering system (for example, potential damage location).
When you maintain PM assemblies in BOMs that are relevant to PM, the system checks the component. You can only maintain this field if the BOM component is a material.
In BOM reporting functions, you can select items that are relevant to plant maintenance and that are defined as PM assemblies. However, PM assemblies are not exploded down further.