SAP BLOG Day in the life of a Material Buyer – 3- Purchasing

SAP Blog

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22 Ara 2017
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Purpose: The purpose of this blog post is to bring the real-life day-to-day scenarios of a material buyer based on my own domain experience as a material buyer.

This is the Third blog post of the series – Day in the Life of a material buyer. Please go through the previous blog posts listed below.

Day in the life of a Material Buyer – 1– Overview of buyer functions –

Day in the life of a Material Buyer – 2– Vendor acknowledgment and communication

Here I would explain the third activity with SAP tools.

  • Purchasing activities.
    • Activities related to Purchase requisitions.
    • Purchase order-related activities like
      • ME58 – Convert Assigned Purchase Requisitions to Purchase Orders
      • ME57 – Assign and Process Purchase Requisitions to Purchase Orders
      • MEAN – Delivery Address
      • PO Release Approval
      • Purchasing Document – Closing Procedures.
  • Other purchasing strategies (Are not covered in this blog post)

–Scheduling Agreements​

–Stock Transport Orders​

–Kitted Material Process​

–Subcontracting Process​

–Kan Ban Process​


–3rd Party Ship Drop Process​


Purchasing flow in SAP .



Purchase requisition transactions

StepActivityTcode in SAPRemarksFiori App (To update soon)
1Create Purchase RequisitionME51KPurchase Requisition created

Purchase Requisition
ME52KPurchase Requisition changed
3Material Requirements Planning (MRP) ProcessSee P2P Process

MRP-generated Purchase Requisitions
4Display Purchase RequisitionME53KPurchase Requisition displayed
5Convert Planned Orders to Purchase Requisition



Purchase Requisition(s) created from MRP planned order(s)

Key things to remember in purchase requisitions as a buyer.

  • Account Assignment Category

–A key indicating whether an item is to be assigned to an auxiliary account (such as a cost center). The account assignment category determines which account assignment details are required for the item (for example, cost center or account number).

  • Item Category

–An identifier indicating the characteristics of an item. The item category determines whether the following are mandatory or permitted for an item:

  • Material number
  • Additional account assignment
  • Inventory management in the SAP system
  • Goods receipt
  • Invoice receipt

Purchase Order Process

  • System-generated purchase order.
      • A purchase requisition is generated via the Material Requirements Planning (MRP) process. A buyer converts the purchase requisition into a purchase order. The purchase order is subject to approval based on the release strategy. The buyer then sends the purchase order to the vendor.
      • Goods are shipped from the vendor, and the receipt of the goods is done with reference to the purchase order.
      • The invoice is received from the vendor. Invoices are entered with reference to a purchase order. The vendor is paid by accounts payable.
  • Purchase order Process Flow
StepActivityTcode in SAPRemarksFiori Apps to be updated
1Review MRP List (optional)MD06Results of latest MRP run viewed.
2Display and assign purchase requisitionsME57Unassigned requisitions are displayed, and sources of supply assigned
3Convert assigned requisitions to purchase ordersME58The system generates a purchase order.
4Approval of purchase ordersME28 / ME29NThe purchase order is now released.
5Transmit purchase orderME9FThe purchase order is printed, faxed, e-mailed, as needed
6Goods ReceiptMIGOMaterial is received.
7Invoice Receipt by Line ItemMIROThe invoice is verified.
8vendor Outgoing PaymentSee finance processThe outgoing payment is processed.

As a buyer, you should also be aware what are the different types of purchase document types created by your consultant. For eg, you may have a separate document type (Usually NB standard sap , but could be different based on need).

  • NB – System generated
  • MAN- Manually created
  • RET- Returned to vendor PO
  • CON- Consumables.
  • AST -Asset purchase.

Each would ideally have its own number range,

Different Purchase order Scenarios you may face are as below.

DescriptionAccount Assignment CategoryDescriptionItem
StockNB or CustomSystem-Generated or
Manual Created
SubcontractingNB or CustomSystem-Generated or
Manual Created
Third-party (Sales Order)NB or CustomSystem-Generated or
Manual Created
XAll Account Assgts.SThird-party
Sales Order (Ship Loose)NB or CustomSystem-Generated or
Manual Created
MProcure to order
ConsignmentNB or CustomSystem-Generated or
Manual Created
Consumable Materialusually CustomAssets/ConsumablesKCost center
Consumable Serviceusually CustomAssets/ConsumablesKCost center
Fixed Assetusually CustomAssets/ConsumablesVPurchase to BS acct
Return to Vendorusually CustomReturn to Vendor Ord
Stock TransferUBStock Transport orderUStock transfer

This blog post is more focused on Material buyers (end users) and new consultants may find it useful to understand SAP MM functionality better.

Do give feedback to make this blog post better.

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