Use Transaction ME01. Enter the Material Number and the Plant Data. Enter source list records, validity period, period of time material is procurable, Vendor Number, responsible Purchasing  Organization (or number of the Agreement or Contract), PPL (if the material can be procured from another plant), Fixed Source (?), MRP control.

Also, a check should be done to see whether any source list records overlap. To do so, choose Source List –> Check.

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