End-to-End SAP Integration: Plant Maintenance Meet...

GowthamParasa · ‎2025 Apr 15

Context:

This blog presents a comprehensive guide to the integration of SAP Extended Warehouse Management (EWM) with Plant Maintenance (PM), highlighting the key configurations, master data prerequisites, and end-to-end process flow.
The integration facilitates efficient planning, staging, and consumption of spare parts and components required for maintenance activities. By enabling seamless coordination between warehouse and maintenance operations, it supports timely repairs and preventive maintenance, ultimately improving operational reliability.
This guide is tailored for SAP consultants and business stakeholders involved in the design, implementation, or support of EWM-PM integration across industries such as automotive, oil and gas, cement, pharmaceuticals, and life sciences.

Flowchart for EWM-PM Integration:

Business Justification for PM-EWM Integration:

For example, Consider Automotive Industry where production lines operate with minimal tolerance for downtime, the integration between SAP EWM and Plant Maintenance (PM) is essential.
In a 4-wheeler vehicle manufacturing facility, seamless coordination between maintenance and warehouse operations is critical to avoid disruptions on the shop floor. Suppose a warehouse maintenance supervisor identifies a malfunction in a key material handling system—such as a conveyor belt or hydraulic lift—used for transporting vehicle components. A Plant Maintenance (PM) order is promptly created in SAP to address the issue, requiring specific spare parts like motors, belts, or control units.
With EWM-PM integration enabled, SAP EWM automatically generates a warehouse task to pick and stage the required components from the EWM-managed inventory.
This real-time integration ensures the maintenance team receives the necessary parts without delay, minimizing operational downtime, expediting repairs, and ensuring continued support for production. Moreover, the system enables precise inventory tracking and cost control, contributing to efficient and reliable plant operations.

Understanding Key Roles and Master Data in SAP Plant Maintenance (PM):

👥Core User Roles in SAP PM

Maintenance Planner (SAP_WP_Maintenance_Planner)
Responsible for planning maintenance activities, creating work orders, and scheduling tasks with required resources. This is a more technical and planning-oriented role that ensures maintenance work is properly structured and assigned.
Maintenance Supervisor (SAP_WP_Maintenance_Supervisor)
Oversees and manages the execution of maintenance tasks, ensuring timely completion and operational compliance. The supervisor plays a coordination and ownership role.
Maintenance Technician (SAP_WP_Maintenance_Technician)
Executes the assigned maintenance tasks, performing actual repairs or inspections based on the instructions and work orders provided by the supervisor.

Plant Maintenance Industries: Oil and Gas , Cement, Life Sciences , Pharmaceuticals, Automotive etc.

Two key Roles in PM – Functional Location and Equipment – Based on this Work Order or Maintenance Order is Created.

Functional Location
A structured hierarchy representing the physical location where a technical object (like equipment) can be installed. It allows maintenance planning based on asset location.
Equipment
Represents individual, maintainable assets installed at functional locations—such as pumps, motors, or machines. Maintenance tasks and history are often tracked at this level.

Configuration in PM:

Define Maintenance Plant: SPRO --> Ref IMG --> Enterprise Structure --> Definition --> Plant Maintenance --> Maintain Maintenance Planning Plant

Assign Maintenance Planning Plant to Maintenance Plant SPRO --> Ref IMG --> Enterprise Structure --> Assignment --> Plant Maintenance --> Assign Maintenance Planning Plant to Maintenance Plant

Define Planner Group : Spro --> Ref IMG --> Plant Maintenance and Customer Service --> Master Data in PM and Customer Service --> Technical Objects --> General Data --> Define Planner Groups.

Create Structure indicator for Functional Location : SPRO --> Ref IMG --> Plant Maintenance and Customer Service --> Master Data in PM and Customer Service --> Technical Objects --> Functional Locations --> Create Structure indicator for Functional Location

Functional Location: Edit Mask --- A --> Alpha , N --> Numeric , X --> Alpha Numeric , S --> Special

Define Category of functional Location SPRO --> Ref IMG --> Plant Maintenance and Customer Service --> Master Data in PM and Customer Service --> Technical Objects --> Functional Locations --> Define Category of functional Location

Define Default Value for Deliveries: Logistics-Execution --> Decentralized WMS Integration --> Central Processing --> Application --> Inventory Management Interface and Delivery-Relevant Data --> Define Default Values for Deliveries

PM Master Data:

Profit Centre: (KE51)

Cost Centre: (KS01)

Work Centre: (IR01)

Now Double Click on 001

Create Task List : (IA05)

Create Functional Location ( IL01) :

Create a Equipment: (IE01)

Configuration in EWM:

Go to T-code: SCPR20 -- Activate BC Set : /SCWM/DLV_OUTBOUND_PM
Map ERP Doc. Types to EWM Doc. Types : SPRO --> Ref IMG --> SCM EWM --> EWM --> Goods Issue Process --> Outbound Delivery --> Define Document Types for Outbound Delivery Process

Map ERP item. Types to EWM item. Types : SPRO --> Ref IMG --> SCM EWM --> EWM --> Goods Issue Process --> Outbound Delivery --> Define Items Types for Outbound Delivery Process

Map Document types from ERP System to EWM : Simg --> SCM EWM --> EWM --> Interfaces --> ERP Integration --> Delivery Processing --> Map Document types from ERP System to EWM

Map Item types from ERP System to EWM: Simg --> SCM EWM --> EWM --> Interfaces --> ERP Integration --> Delivery Processing --> Map Item types from ERP System to EWM

Warehouse Process Type: Spro --> Ref IMG --> SCM EWM --> EWM --> Cross-Process Settings --> Warehouse Task

Define Warehouse Process Type:

Define Control Indicators:

Determine WPT:

Stock Removal Strategies: Spro --> Ref IMG --> SCM EWM --> EWM --> Goods Issue Process

Define Storage Type Search Sequence:

Assign Storage Types to Storage Type Search Sequence:

Define Stock Removal Control Indicator:

Determine Storage Type Search Sequence:

Pick-HU:

Go to T-code : /n/scwm/seba:

WPT for Pick-HU: Spro --> Ref IMG --> SCM EWM --> EWM --> Cross-Process Settings --> Warehouse Task --> Define Warehouse Process Type:

Spro --> Ref IMG --> SCM EWM --> EWM --> Master Data --> Define Warehouse Number Control

Storage Type: Spro --> Ref IMG --> SCM EWM --> EWM --> Master Data --> Define Storage Type

Create Bins , Generate Activity Area and do the Bin Sorting in the Storage Type PM01

Test Scenario :

Create a Maintenance Notification in Iw21:

Go with the Notification Type M1 which is called Maintenance Request and press enter

Once you click on enter , Functional Location , Planner Group , Main WorkCentre, Revision will be Auto-populated basing on the Configuration.

Now go to Change Mode or Iw22: If we see the Status of the Notification, it will be in UNAP mode which is called Unapproved.

Now Supervisor will check the Notification and if everything is okay , it will be getting approved for Work Order Creation. In this Case , we will approve it and Save it.

Now go the Change Mode of the Approved Notification or Iw31 to create Work Order

Once we click to create Order , below Screen will be Popped-up and the Details will be filled Automatically.

Now Click on Green tick Box and Work order, or Maintenance Order will be Generated.

Below is the Maintenance Order which got Created

Now Go to Operations Tab:

Click on Yes

Give the Functional Location and then Click on Execute

Now Go to Components Tab:

Here the Components will be Entered basing on the Material Availability in MB52 in AFS Location.

Select the Item and Go to General Data Tab. Here you can get the Reservation Number and Movement type for the Maintenance Order.

Here the Cost Tab will be Empty and it will be filled once the Maintenance Order is Released. Now Check all the Remaining Tabs and Save it.

Now the Maintenance Order is Created for Notification.

Now Go to Iw32 T-code and Release the Order and Save it.

Now go to MB26 to Create the Pick-List by Giving Reservation Number and Plant and click on execute:

Click on Save.

Now Once the Goods Movement Got posted from MB26 , in the Background Outbound Delivery will be Generated.

Now on the same screen , go to T-code VL03N and you can the See Outbound Delivery which got generated.

Now go to the T-code : /n/scwm/PROD.

Go to Advanced Search box and give the Reservation Number and execute it and you can see the Document got distributed as Outbound Delivery Order.

Now go to Reference Documents tab and see the Documents got Generated in S4 w.r.to Document number 4806.

Now Create the Picking Task:

Click on Create:

Now Click on Create+Save and Warehouse Order will be Created.

Here Queue is Detected as Outbound.

Now Let’s Confirm Picking and Packing from RF Screen for this Delivery.

After Enter the Packing Material , Click on F2 and after that Pick-HU will be Created.

Now Click on F4

Scan Storage bin , Aqty and Dest HU and then Click on Enter.

Below is the Screen Visible:

Now Scan the Destination bin and Destination HU and then click on Enter.

Now Comeback to Desktop and Check the status of the Picking and Packing.

Now Do the Goods Issue and Outbound Delivery will be Generated.

Note:When a PM Outbound Delivery is created in S/4HANA, a document number such as 80007716 is generated. This delivery is then distributed to EWM as an Outbound Delivery Order with a separate internal number (e.g., 4806). Upon completing the Goods Issue in EWM, an Outbound Delivery Document is generated in EWM using the same number (80007716) as the original S/4HANA Outbound Delivery.

Now Go to T-code Vl03N and go to Goods Movement tab:

Now Goto MB51 and See the Movement type which got Triggered:

Movement Type is 261 à Goods Issue for Order

Conclusion:

SAP PM-EWM integration enables faster spare parts provisioning, reduced downtime, and enhanced traceability. This guide outlines a practical flow to streamline maintenance execution, ensuring alignment between warehouse and maintenance teams.

ThomasSlack27 · ‎2025 May 22

@GowthamParasa great summary of the process. one note is that when it comes to the delivery number in EWM that is generated, you do have the ability to use the outbound delivery number in S/4HANA as the delivery number in EWM. this helps with reducing the amount of different document numbers that a user might need to reference throughout the process.

you can check this box below to use the outbound delivery from S/4HANA in EWM:

GowthamParasa · ‎2025 May 22

@ThomasSlack27

Thank you for pointing this out!
Enabling the “ERP Ref No is Doc No” is a great tip—it really helps simplify traceability by keeping delivery numbers consistent between S/4HANA and EWM. I appreciate the insight and will be sure to highlight this in future updates.

End-to-End SAP Integration: Plant Maintenance Meets Warehouse Management