In SAP ECC, Plant Maintenance (PM) and Materials Management (MM) are two critical modules that, when integrated, ensure efficient maintenance operations and seamless material availability. The integration between PM and MM facilitates the management of spare parts, maintenance materials, and procurement processes, contributing to reduced downtime and optimized maintenance costs.
Integration between these modules ensures that maintenance work orders have the required materials available when needed, avoiding delays and ensuring smooth operations.
The integration primarily revolves around the maintenance order processing in PM and the procurement and inventory management functions in MM. Here are the key points of interaction:
When a maintenance order is created in PM, it often includes a list of required spare parts and materials. These requirements trigger material reservations in MM to ensure stock availability. If stock is insufficient, MM triggers procurement processes such as purchase requisitions or direct purchase orders.
Materials issued for maintenance activities are posted via goods movements managed by MM. Common transactions include:
These goods movements update both inventory levels in MM and cost tracking in PM.
When materials are not available in stock, PM triggers purchasing processes in MM through purchase requisitions. MM handles supplier selection, purchase order creation, and invoice verification, ensuring timely supply of maintenance materials.
MM maintains detailed inventory records for maintenance materials, tracking stock quantities, batch numbers, and material valuations. This information is crucial for cost accounting and maintenance budgeting in PM.
| SAP Transaction | Description |
|---|---|
| IW31 | Create Maintenance Order |
| MB21 | Create Reservation |
| MIGO | Goods Movement (Issue/Receipt) |
| ME51N | Create Purchase Requisition |
| ME21N | Create Purchase Order |
| COHV / IW38 | Maintenance Order Monitoring |
The integration of Plant Maintenance (PM) with Materials Management (MM) in SAP ECC is essential for maintaining equipment reliability and operational efficiency. It ensures that maintenance teams have timely access to the necessary materials while enabling accurate cost control and inventory management. By leveraging the synergy between these modules, organizations can reduce downtime, optimize inventory levels, and streamline maintenance workflows.