Which of the following are changes to material master records?

The change regarding the material master records that is accurately reflected in the context provided is that MRP (Material Requirements Planning) always considers quota arrangements. This means that when planning for material supply, the system takes into account pre-defined quota arrangements that dictate the allocation of materials from various sources. This capability enhances the efficiency of inventory management and production planning by allowing for a more structured approach in utilizing different vendors or production lines based on agreed-upon percentages.

In contrast to this, extending the length of material master fields, introducing new strategies for repetitive manufacturing in MRP4, or creating a new material master type labeled SERV are not changes directly linked to the existing functionality of material master records in the context of MRP. While these might be valid considerations or capabilities in an updated material management system, they do not directly affect how MRP processes the material master data concerning the planning function as outlined in the question.