EDI Implementation: What to Do When a Customer Requires EDI

Your customer requires EDI, and now you need to figure out what to do next.

Now what?

For many suppliers, manufacturers, distributors, and growing businesses, this is where the questions begin. What EDI documents do you need to exchange? Which communication protocol should you use? Does your ERP need to be integrated? How long will implementation take? And do you need to build an internal EDI team?

The good news is that becoming EDI compliant does not necessarily mean building a complex EDI infrastructure from scratch.

The right approach depends on your customer’s requirements, your existing business systems, transaction volume, number of trading partners, and internal resources.

In this guide, we’ll walk through the EDI implementation process and explain the main options available when a customer requires EDI.

If EDI is new to your organization, understanding what EDI is and why it matters can provide useful context before you begin the implementation process.

1. What to Do When Your Customer Requires EDI

Before choosing an EDI solution, you need to understand exactly what your customer requires.

Receiving a message that says “EDI is mandatory” is only the starting point. Your trading partner should provide implementation guidelines that define how transactions need to be exchanged.

A successful EDI implementation starts with documenting these requirements before choosing software, configuring connectivity, or mapping data.

Start by identifying the following.

Which EDI documents are required?

Different trading partners may require different business documents.

Common EDI transactions include:

• EDI 850 — Purchase Order
• EDI 855 — Purchase Order Acknowledgment
• EDI 856 — Advance Shipping Notice
• EDI 810 — Invoice
• EDI 820 — Payment/Remittance Advice

You may not need all of these documents. The requirements depend on the relationship and business processes you have with your customer.

Which EDI standard is required?

Your customer may specify a particular standard, such as:

• ANSI X12
• EDIFACT
• XML
• Partner-specific formats

For businesses working with North American trading partners, ANSI X12 is particularly common.

Which communication protocol is required?

The customer may also specify how EDI documents must be transmitted.

Depending on the trading relationship, this can include:

• AS2
• SFTP
• VAN
• HTTPS
• Other supported connectivity methods

This information should be confirmed before implementation begins.

What are the customer’s implementation guidelines?

The EDI standard alone does not define every detail of the transaction.

Your customer may have specific requirements for:

• Required segments
• Data elements
• Qualifiers
• Product codes
• Units of measure
• Identifiers
• Testing procedures
• Document validation
• Error handling

The first step in an EDI implementation is therefore not choosing software. It is understanding the requirements.

2. Determine How EDI Will Fit Into Your Business

Once you understand what your customer requires, the next question is how EDI will work with your existing operations.

This is where many companies make an important distinction between simply exchanging EDI documents and actually integrating EDI into their business processes.

For example, your customer may send an EDI purchase order.

Ideally, the information should not have to be manually copied from an EDI system into your ERP.

Instead, the process can look like this:

Trading Partner → EDI → Integration Layer → ERP

And when your company sends an invoice:

ERP → Integration Layer → EDI → Trading Partner

This allows business information to move between systems without unnecessary manual intervention.

If you already use an ERP, WMS, or other business application, determine whether your EDI solution needs to integrate with those systems before selecting an EDI implementation approach.

3. Choose the Right Way to Become EDI Compliant

There is no single EDI model that works for every company.

Depending on your business requirements, there are several ways to approach EDI implementation.

If a customer requires EDI, the best option depends on how much automation, integration, and ongoing support your business needs.

Option 1: Web EDI

Web EDI allows users to exchange EDI documents through a web-based platform.

This can be a practical option for companies with:

• A small number of trading partners
• Lower transaction volumes
• Limited integration requirements
• A need to get started with EDI quickly

Instead of integrating EDI directly with internal systems, users interact with the EDI platform to send or receive documents.

For a smaller EDI operation, this can provide a straightforward path to compliance.

Option 2: Integrated Cloud EDI

If your business processes a higher volume of transactions or needs automation, integrating EDI with your existing applications may be a better option.

A cloud EDI solution can connect your business systems with your trading partners and automate the exchange of information.

For example:

Purchase Order received

Trading Partner → EDI → Integration → ERP

Invoice sent

ERP → Integration → EDI → Trading Partner

This reduces manual data entry and allows EDI transactions to become part of your existing business workflows.

Option 3: Managed EDI Services

Some companies need EDI but do not want to build and maintain an internal EDI department.

In that case, a managed EDI service can provide the technical expertise required to implement and operate the environment.

Depending on the provider and solution, this can include:

• EDI implementation
• Trading partner onboarding
• Data mapping
• Connectivity setup
• Testing
• Monitoring
• Error resolution
• Partner requirement changes
• Ongoing maintenance

This approach can be especially useful when your internal IT team does not have dedicated EDI expertise.

For companies looking for an EDI implementation without building an internal team, managed services can reduce the technical and operational burden.

4. Connect EDI to Your ERP and Business Systems

Becoming EDI compliant is not simply a matter of transmitting files.

The real value of EDI comes from connecting the information exchanged with the systems that run your business.

Consider a typical purchase order process.

Without integration:

Customer sends EDI 850 → EDI platform → Employee reviews document → Employee enters order into ERP

With integration:

Customer sends EDI 850 → EDI platform → Integration → ERP

The second model reduces manual intervention and can help minimize data-entry errors and operational delays.

The same principle can apply to other transactions, including invoices, shipping notices, acknowledgments, and payment information.

Your EDI implementation strategy should therefore consider not only how documents are exchanged, but also what happens to the information after the document arrives.

5. Map Your Business Data to the EDI Format

One of the most important technical steps in an EDI implementation is data mapping.

Your ERP and business applications store information according to your internal data structure.

Your trading partner, however, expects that information in a specific EDI structure.

The mapping process connects the two.

For example:

Your ERP

Customer

Product

Quantity

Price

Delivery date

↓

EDI Mapping

↓

X12 850 Purchase Order

↓

Trading Partner

The mapping determines how information from your internal systems corresponds to the segments and data elements required by the trading partner.

This is also where partner-specific requirements become important.

Two trading partners may use the same EDI standard but have different implementation guidelines.

A successful EDI implementation therefore requires more than connectivity. The data must be mapped, validated, and transformed correctly.

6. Establish Connectivity With Your Trading Partner

After defining the requirements and mapping, the EDI connection needs to be established.

The connectivity method depends on your customer’s requirements and the EDI environment.

Common options include:

AS2

AS2 is widely used for secure business-to-business document exchange and is common in EDI environments.

SFTP

SFTP provides a secure method for exchanging files between systems.

VAN

A Value-Added Network can provide managed EDI connectivity between trading partners.

Other connectivity methods

Depending on the architecture and trading partner, other technologies may also be supported.

The important point is that connectivity is only one component of an EDI implementation.

You still need to make sure the documents are correctly mapped, validated, processed, and integrated with your business applications.

7. Test Your EDI Transactions Before Going Live

Once the connection and mappings are configured, the next step is testing.

Most trading partners will require testing before allowing production transactions.

This is particularly important when a customer requires EDI before you can begin sending or receiving production documents.

A typical EDI implementation process may look like:

Requirements → Setup → Mapping → Connectivity → Testing → Validation → Approval → Production

During testing, issues may be identified such as:

• Missing required fields
• Incorrect codes
• Invalid qualifiers
• Incorrect document structures
• Mapping errors
• Connectivity problems
• Partner-specific requirements that were not correctly implemented

Testing is important because an EDI transaction can be technically transmitted successfully and still contain incorrect business data.

The goal is not simply to prove that a file can be sent.

The goal is to prove that the right business information is exchanged in the format your trading partner expects.

8. Go Live — But EDI Implementation Doesn’t End There

Getting your first production transaction through the EDI connection is an important milestone.

But going live is not the end of EDI management.

It is the beginning of ongoing EDI operations.

After implementation, your business may need to manage:

• Transaction monitoring
• Failed or rejected documents
• Data errors
• Trading partner changes
• New transaction types
• New trading partners
• Mapping updates
• Connectivity issues
• Compliance requirements
• Ongoing technical support

This is one reason companies should consider how EDI will be managed after implementation, not just how it will be launched.

A solution that works during the initial EDI implementation still needs to remain reliable as your business and trading partner network grow.

9. Do You Need to Build an EDI Department?

Not necessarily.

Companies that are new to EDI often assume they need to hire or train specialists to manage the entire environment internally.

An internal EDI operation may require expertise in areas such as:

• EDI standards
• Data mapping
• Integration
• Connectivity
• ERP systems
• Testing
• Monitoring
• Troubleshooting
• Trading partner requirements

For organizations with a large EDI operation, developing this expertise internally may make sense.

For others, outsourcing some or all of these responsibilities can be a more practical approach.

When a customer requires EDI, outsourcing can allow a company to meet the requirement without immediately creating an internal EDI team.

Build internally

Your company manages the EDI environment and develops the required expertise in-house.

Manage an EDI platform internally

You use an EDI solution but your team remains responsible for implementation, monitoring, maintenance, and partner changes.

Use managed EDI services

An experienced EDI provider manages key parts of the implementation and ongoing operation on your behalf.

The right choice depends on your transaction volume, internal resources, technical capabilities, and growth plans.

10. Your EDI Implementation Checklist

If a customer requires EDI, use this checklist to organize your next steps:

• Obtain your customer’s EDI requirements
• Identify the required transaction types
• Confirm the EDI standard
• Confirm the communication protocol
• Review the trading partner’s implementation guidelines
• Determine whether ERP integration is required
• Choose the appropriate EDI approach
• Establish connectivity
• Complete data mapping
• Test transactions
• Obtain trading partner approval
• Move to production
• Monitor transactions after go-live
• Establish a process for ongoing support and maintenance

This checklist can help you move from “We need EDI” to a structured EDI implementation plan.

What Should You Do When a Customer Requires EDI?

A customer requiring EDI does not automatically mean that you need to build an EDI department or invest in a complex infrastructure.

The right approach starts with understanding the customer’s requirements and then determining how EDI should fit into your existing business systems and processes.

For some companies, Web EDI may be enough.

For others, direct integration with an ERP or other business applications may provide greater automation.

And for companies that need EDI expertise without building an internal team, managed EDI services can provide another path to compliance.

The key is to look beyond the EDI document itself.

Successful EDI connects trading partners, business applications, data, and processes into a reliable flow of information.

Need to become EDI compliant?

BTOB XPERTS helps businesses implement EDI, connect with trading partners, integrate EDI with existing business systems, and manage ongoing EDI operations.

Talk to an EDI expert and find the right approach for your business.