3422280 - Flexible Workflow for Purchase Requisitions created by MRP

• Purchase Requisitions have been created by MRP.
• Per standard designed they are not involved on the Flexible Workflow Approval Process. 

"Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental." 

SAP S/4HANA Cloud Public Edition

• Due to Performance reasons the Purchase Requisitions created by MRP are not relevant for the Approval Process.
• A later change on those PR will move them to the approval process in case  the start conditions are met.
• The change on the PR can be done manually, assigning a Source of Supply or through the Hand Over Process in the MRP side. 
• The Hand Over Process in the MRP area will move the Purchase requisitions to the Approval Process if the Start conditions are met. It can be executed individually or in Mass.

The Hand Over Process can be scheduled. 

Once the Hand over Process is executed for a Purchase Requisition, it will be marked as Firmed and next MRP will not change it.

See this blog - Hand Over Purchase Requisitions created by MRP to know how to activate the Hand Over Process.

Help Portal - Hand Over Purchase Requisitions

KBA , MM-FIO-PUR-REL , Fiori UI for Purchasing Approval , How To