There are additional logical dependencies to field selection. When you enter FX (indicator for fixed lot size) in the Lot Sizing Procedure field on the standard view tab page MRP 1, for example, the Fixed Lot Size field becomes mandatory.
Another example is Material Group field in the Basic Data 1 view. This field becomes mandatory whenever you select purchasing data for the creation of a material master record.
You can define lock-relevant fields for the material master record. You can use this function only in SAP systems for industry, not for SAP Retail. You specify, in Customizing, which fields of the material master record are lock-relevant.
If you lock a material master record, the fields that are flagged as lock-relevant in Customizing can no longer be changed in material master maintenance. In the dialog shown in the figure, these fields are no longer ready for input; the exception is required-entry fields in which you have to enter data when extending a material master record. The lock comes into effect when the system saves the material master record.
If you flag a field of a material master record as lock-relevant although changes are already planned for this field, the changes will not take effect. You can lock a material master record at any time during material master maintenance. You can only reverse the lock with the corresponding authorization and if the material is not subject to configuration management.
The relevant authorization object is M_MATE_MAF:
- Activity 16 – user can lock materials
- Activity 51 – user can reverse material lock
You can also lock material master records and reverse the lock with mass maintenance (field MARA-MATFI).
