At Level 0 (zero), Master Scheduling (MS) is run for an MS family. An MS family is a group of parts similar in design, manufacturing process and lead time. 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 and are registered for the site. If the part is handled by project MS then it is registered for both the site and the PNG. 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