SAP MM01

It creates a material master record, choosing the views (basic, purchasing, sales, MRP, accounting, etc.) to maintain, the foundational logistics master data.

• Material number (or auto), material type, industry.
• Views to maintain and their organizational levels (plant, sales org, storage location).
• View data (descriptions, units, MRP, valuation).
• Accounting view (valuation class, price).

• Maintain all views the process needs (esp. accounting to post, purchasing to order).
• Material type controls behaviour/defaults.
• Use a reference material to speed creation.

• Missing view blocks a downstream process.
• Wrong material type/valuation class.
• Duplicate material (governance/MDG prevents this).

• Copying a reference material without reading every field. The copy brings settings nobody chose, and a wrong MRP type or valuation class inherited this way is discovered months later.
• Choosing a material type for convenience. It drives the number range, the procurement type, the valuation and which views exist, and it cannot be changed afterwards.
• Setting the base unit of measure carelessly. Everything converts from it, and changing it once stock or documents exist is effectively impossible.
• Creating in production before the process owner has agreed the values. Each view has an owning function, and creating first means correcting later across all of them.
• Extending views one error at a time. Decide the full set the process needs before you start, or you will meet each missing view as a failure in a different transaction.