At Level 0 (zero), Master Scheduling is run for groups of parts. Only parts having planning method O, Level 0 Part, can be calculated in MS at Level 0. A Level 0 part is a form of a blow-through part and cannot have a balance on hand or be ordered.
Level 0 parts are used to group parts for MS. For example, a main product with several variants that can be planned easily on a long-term basis might be grouped under one Level 0 part.
In the structure of a Level 0 part, you can either enter the end products directly or use master schedule blow-through parts as an intermediate step between Level 0 and the end product. Blow-through parts in the structure of a Level 0 part have planning method T. This is a special type of blow-through part designed to be used with Master Scheduling. A T part cannot have a balance on hand and cannot be ordered. A T part can occur on one or more levels.
Level 0 parts are broken down only for gross demand; existing supplies are not considered. This is applicable only in Level 1 planning.
Below is an example of a Level 0 part structure:
Example of a Level 0 structure