Link PO Doc types to Materials

Question

Dear experts,
A pretty straight forward question for you:
I have configured a number of PO document types, I'd like to make sure that if a particular material is procured that it will pick the right document type.
I assume I need to set this up in the material master, but am unsure where to make this set up,
Your help is greatly appreciated!
Thanks, Mark

Answer 1

Hello, Mark,
nope, in SAP standard there is no link/controll between Material Type and Purchase Order Type.
If you simply want to check that users are using correct PO types (i.e. in manual creation), you can achieve it either with customer enhancement MEREQ001 "Customers' Own Data in Purchase Requisition" (function EXIT_SAPLMEREQ_005 "Checking Customer's Own Purchase Requisition Data"), or BAdI ME_PROCESS_PO_CUST "Enhancements for Purchase Order Processing: Customer" (method CHECK "Closing Check").
If you want the system to automatically choose correct doc.type in MRP ("...it will pick the right document type"), it is neccessary to realize, that MRP does not creat POs, but PREQs. Therefore, if you have for each PO type special PREQ type, you can then:
  -- create MRP groups (SPRO: Materials Management -> Consumption-Based Planning -> MRP Groups -> Carry Out Overall Maintenance of MRP Groups)
  -- assign MRP group to Material Type (...MRP Groups -> Define MRP Group for Each Material Type);
  -- defined default PREQ type type (...Consumption-Based Planning -> Planning -> Procurement proposals -> Define External Procurement)
Kind Regards
TomT
Kind Regards