Purchase Order Creation in SAP MM SAP R/3 Path : SAP Easy Access : Logistics : Materials Management : Purchasing : Master Data : Material Master : Maintain T-Code: MM01(Create), MM03(Display), MM02(Change), MM06(Delete), MMAM (Change Material type), OMS2 (Create Mat. Type), OMS3 (Create Industry Sector), MMRR (Create and assign Number Range) Related Tables : MARA, MARC(Plant Specific data), MARD(S.Loc specific data) How to create a Purchase Order Step 1)   Execute transaction code  ME21N,  Enter vendor,  material number,  quantity and unit of measureand P ress  ENTER  to confirm the data entered. Purchase order is now populated from purchase info record and material master , and vendor master data.  In below screenshot , 1  and  2  were populated from PIR, while  3  was populated from vendor master. Default texts populated via PIR -  Info record PO text  and  Info...