SAP MM (Materials Management) and it's T-Codes

Introduction to SAP MM: SAP MM (Materials Management) is one of the most important modules in SAP ERP. It helps businesses manage their procurement, inventory, and material requirements planning efficiently. Every company, whether big or small, needs to purchase raw materials, store them properly, and track their movement. SAP MM automates these processes, reducing errors and improving efficiency.

SAP MM is a powerful tool that helps companies manage their materials, vendors, and inventory effectively. Learning the right T-Codes can make your work faster, easier, and more efficient. If you are new to SAP MM, start with basic T-Codes like MM01, ME21N, and MIGO to understand how materials are managed in SAP.

SAP MM is widely used in industries like manufacturing, retail, and logistics to manage materials, suppliers, and stock levels.

Key Functions of SAP MM

SAP MM has two major functions:

1️. Procurement Process (Purchasing): This process involves buying materials from vendors. It includes:

✔ Purchase Requisition (PR): Internal request to buy materials.
✔ Purchase Order (PO): Formal order sent to a vendor.
✔ Goods Receipt (GR): Checking and receiving materials from the vendor.
✔ Invoice Verification: Processing supplier payments.

2️. Inventory Management: This function helps track materials stored in warehouses. It includes:

✔ Stock Overview: Checking available materials.
✔ Goods Issue: Issuing stock for production or sales.
✔ Stock Transfer: Moving materials between storage locations.
✔ Physical Inventory: Counting stock to match system data.

Why is SAP MM Important?

• Reduces manual work and improves accuracy.

• Prevents stock shortages and excess inventory.

• Ensures smooth supply chain operations.

What are T-Codes in SAP?

T-Codes (Transaction Codes) are shortcut commands used in SAP ERP to quickly access specific functions without navigating through multiple menus. Each T-Code is a unique identifier assigned to a particular transaction or operation.

How to Use a T-Code?

1️. Open SAP Easy Access screen.
2️. Enter the T-Code in the Command Field (top-left).
3️. Press Enter to open the transaction screen.

Here is the list the most important T-Codes:

Material Master
T-Code Function
MM01 Create a new material
MM02 Change material details
MM03 Display material information

Vendor Management
T-Code Function
XK01 Create vendor master data
XK02 Change vendor details
XK03 Display vendor information

Purchasing Process
T-Code Function
ME21N Create a Purchase Order
ME22N Change a Purchase Order
ME23N Display a Purchase Order

Inventory Management
T-Code Function
MIGO Perform goods movement (receipt, issue, transfer)
MB51 View material document history
MB52 Check stock overview

Invoice Verification
T-Code Function
MIRO Enter vendor invoice
MRBR Release blocked invoices

Material Requirements Planning (MRP)
T-Code Function
MD01 Run MRP for material planning
MD04 Display stock/requirements list

Reporting & Analysis
T-Code Function
MB5T View stock in transit
ME2L List purchase orders by vendor