This video tutorial provides an in-depth explanation of the customization of material types in SAP MM (Materials Management), focusing on number range, field selection, and other related aspects. The presenter discusses the importance of material types and how they control various functions like procurement type, views relevant for maintenance, external alphanumeric number assignment, and type of inventory management. The tutorial also covers the concept of material status, which determines in which areas or applications a particular material can be used, such as purchasing, BOM maintenance, routing in PP, production orders, MRP, and more.

Key topics covered in video are:

1. Material Types and Their Attributes: The presenter explains the significance of assigning a material type when creating a material in SAP. Material types control numerous functions, including procurement type, views relevant for maintenance, external alphanumeric number assignment, and the type of inventory management.
2. Material Status and Its Impact: The tutorial covers the concept of material status, which determines the areas or applications where a particular material can be used. This includes purchasing, BOM maintenance, routing in PP, production orders, MRP, and more.
3. Number Range Assignment: The presenter discusses the assignment of number ranges to material types. The system will take the number from the assigned number range when a material with a particular material type is created.
4. Field Selection Control: The video explains how every field in the material master is assigned to a field selection group. The presenter demonstrates how to make fields required, optional, or hidden at the material type level, transaction level, industry sector level, and plant level.
5. Lock Relevant Fields: The tutorial covers the option of locking certain fields in the material master. When a field is locked, it is in display mode and cannot be changed unless the lock is reversed.
6. Field Reference: The presenter discusses the concept of field reference, which is assigned to a field selection group. This field reference can be maintained at the transaction level, material type level, industry sector level, plant level, procurement indicator level, and SAP delivery level.
7. Influencing Factors for Field Selection: The tutorial explains the influencing factors for field selection, which include material type level, transaction level, industry sector level, plant level, procurement indicator level, and SAP delivery level. The system takes priority from left to right, with hidden fields taking first priority.
8. Locking and Unlocking a Field: The video demonstrates how to lock and unlock a field in the material master. When a field is locked, it is in display mode and cannot be changed unless the lock is reversed.