How to Approach Manufacturing ERP Integration for Your Factory?

You already have an ERP in place. Maybe it’s SAP S/4HANA, Microsoft Dynamics 365, Oracle Fusion, Epicor, or another platform.

You also have manufacturing systems such as MES, WMS, PLM, or QMS that need to work with it.

Now you’re planning to integrate them.

This blog will help you approach that integration from a business and project perspective.

You’ll learn what to prepare before approaching an manufacturing ERP integration partner, what a good assessment should cover, how to evaluate standard vs. custom integration, what to include in the proposal, how to define testing and acceptance, and what to expect before and after go-live.

If you already know which systems you need to connect, this is where you should start.

Before recommending an approach, your manufacturing ERP integration partner needs to understand what already exists.

Share:

→ ERP name and version

→ Manufacturing software name and version

→ Cloud or on-premise deployment

→ Number of plants involved

→ Existing integrations

→ Key manufacturing workflows

→ Major customizations

→ Legacy applications involved

→ Any known data or synchronization issues

Major ERP platforms already provide different integration capabilities and ecosystem options.

For example, SAP supports integration between SAP S/4HANA and SAP Digital Manufacturing for manufacturing data such as BOMs, routings, work centers and production orders.

Microsoft provides documented MES integration capabilities for Dynamics 365 Supply Chain Management.

Oracle provides manufacturing APIs for integrating Fusion Cloud Manufacturing with external systems.

Your partner should determine whether your requirement can use:

→ Existing connectors

→ Vendor-supported integration

→ Standard APIs

→ Configuration

→ Custom development

Remember, a custom-built solution should have a clear reason behind it.

Your integration partner should show you what information will move between systems.

For example, for ERP-MES integration:

ERP → MES [Production order, product, quantity, BOM, Routing, Due date]

MES → ERP [Production status, quantity produced, scrap, material consumption, completion information]

The exact data depends on your manufacturing process.

The important part is that the manufacturing ERP integration partner should be able to explain what moves, in which direction, and why.

You should be able to look at their proposed flow and understand it without needing to understand the underlying code.

When two systems contain the same information, someone needs to establish which system controls it.

Ask your integration partner to clarify this for important data. This may include:

→ Product and item information

→ BOMs

→ Production orders

→ Inventory

→ Production status

→ Quality status

→ Product revisions

This becomes especially important when integrating ERP with multiple manufacturing systems.

Ask the partner to first provide an assessment covering:

→ Current systems and required integrations

→ Data flows

→ Existing integration options

→ Custom requirements

→ Dependencies and key risks

→ Recommended approach

→ Implementation phases

Your manufacturing ERP integration will eventually touch production processes, inventory, planning or other operational workflows.

Ask:

“How will you implement the integration without disrupting our current operations?”

Your partner should explain:

→ How existing processes will continue during development

→ How production data will be validated

→ How go-live will be handled

→ What happens if the integration encounters an issue after launch

You should clearly define what you expect from the integration.

This helps your partner understand the requirement, assess the work properly, and create a clear ERP integration roadmap.

For example, you can say:

→ When a production order is released in ERP, the required information reaches MES correctly.

→ When production is completed in MES, the agreed production information reaches ERP.

These become your acceptance criteria.

Don’t test the integration only by checking whether data moves from one system to another. Test the manufacturing processes that depend on that data.

For example, if you are integrating an ERP with an MES, your partner should test scenarios such as:

→ Production order release

→ Material consumption

→ Partial production

→ Scrap and rework

→ Production completion

→ BOM or revision changes

These scenarios help confirm that the integration supports your actual production process, rather than simply proving that two systems can exchange data.

Before choosing a partner, check whether they have:

→ Experience with your ERP, such as SAP, Dynamics 365, Oracle, or Epicor.

→ Experience integrating manufacturing systems such as MES, WMS, PLM, or QMS.

→ Experience with similar manufacturing processes and production environments.

→ A clear approach for handling integration failures, duplicate transactions, missing data, and system downtime.

→ A plan for testing, go-live, and support after implementation.