You picked a new ERP. Everyone agreed. The budget got approved.
You picked a new ERP. Everyone agreed. The budget got approved. Then six months in, you are back in the same meetings asking why nothing is working right.
This happens more than you think. And the reason is almost always the same. Businesses skip writing a proper ERP requirements document before starting the ERP migration. They jump straight to demos, pricing, and vendor calls.
The ERP requirement specification is the one document that stops all of that from going wrong. It keeps your ERP implementation requirements clear, your vendor selection honest, and your whole team moving in one direction.
In this guide, you will learn exactly how to write an ERP system requirements document. Step by step. With a simple template you can start using today.
Why the ERP Requirements Document Matters More Than You Think
Most businesses treat the ERP requirements document as a formality.
They write a few bullet points. They share it in a meeting. Then they move on.
That is where the real problem starts.
Without a solid ERP requirement specification, your vendor will show you what they want to sell. Not what you actually need. You will make a decision based on a polished demo, not your real business ERP needs.
Here is what that costs you.
Nearly 75% of ERP projects go over budget or miss their timeline. The top reason is unclear or incomplete ERP implementation requirements at the start.
That number is not meant to scare you. It is meant to show you that writing this document is not extra work. It is the work that protects every other decision you make after it.
Who Should Be Part of Writing the ERP System Requirements Document
This is a team effort. Not a one-person job.
You need voices from every part of the business. Not just IT. Not just the founder.
Here is who should be in the room:
- Operations lead who knows where the daily work gets slow or stuck
- Finance head who understands what reporting and compliance you must have
- Sales or CRM lead who knows what customer data matters most
- IT or tech lead who can speak to integration and infrastructure needs
- A project owner who will hold everything together across the process
Each person brings a different piece of your ERP project scope. When you have all of them together, the ERP requirements document becomes real. It reflects actual work. Not assumptions.
Step-by-Step Guide to Writing Your ERP Requirements Document
Step 1: Start With Your Business Goals, Not Software Features
Before you write a single requirement, ask one question.
What problem are we solving with this ERP?
Your answer sets the tone for the entire ERP system requirements document.
Maybe your inventory and billing are not synced. Maybe your team runs on too many spreadsheets. Maybe your current ERP cannot handle the volume you are growing into.
Write these goals in plain language. Keep them honest. This section should feel like a note to your future self, not a corporate statement.
Step 2: Document Your Current Process Gaps
This step is where most businesses get lazy. Do not skip it.
Walk through every department. Ask each team lead what is not working right now. Write it down without filtering or judging.
These gaps become your ERP implementation requirements. They are the clearest signal of what the new system must fix.
You are looking for answers to these questions:
- Where does data get entered more than once?
- What approvals take too long or get lost?
- Which reports does leadership need but cannot get today?
These answers are gold. They are the real inputs for your ERP requirement specification.
Step 3: Split Your Requirements Into Must-Have and Good-to-Have
Not every requirement is equal.
When you mix must-haves with nice-to-haves, your ERP vendor selection gets complicated. You end up comparing vendors on features that do not matter yet.
Keep two clear lists:
Must-Have: Things the business cannot run without. Non-negotiable. Day one needs.
Good-to-Have: Things that would add value but are not blockers. Future phase material.
This simple split makes your ERP software requirements much easier to evaluate. It also keeps your ERP project scope realistic.
Step 4: Write the Technical Requirements Section
This is where your IT lead earns their spot in the room.
Your ERP system requirements document must include the tech side of things. Not because vendors love it. But because it protects you from integration disasters later.
Cover these areas:
- Current systems that must connect to the new ERP (payroll, CRM, logistics tools)
- Hosting preference: cloud, on-premise, or hybrid
- Number of users and access levels needed
- Mobile or remote access requirements
- Data migration scope: how much history must move over
This section of your ERP requirement specification is often the most ignored. It is also the one that causes the most trouble when it is missing.
Step 5: Define Compliance and Security Needs
Depending on your industry, this section could be the most important one.
If you are in manufacturing, you may need specific audit trails. If you are in healthcare or finance, you have data handling rules to follow. Your ERP implementation requirements must reflect these needs clearly.
Do not leave this section unclear. Be specific about what your business must comply with and what security standards you expect from the ERP system.
Step 6: Set Your Budget and Timeline Expectations
Yes, this goes in the document.
Vendors will ask. And if you go in without a number, the pricing conversation becomes a negotiation game. You want to control that conversation.
Write a realistic budget range. Write your go-live goal date. Include key milestones you expect to hit along the way.
This makes your ERP migration checklist actionable. It gives your vendor a real framework. And it gives your team a sense of how serious this project is.
Step 7: Describe Your Reporting and Analytics Needs
Every business needs data. But not every business knows which data it actually uses.
Ask your leadership team one question: what reports do you look at every week?
Write those down. Then add any reports that your team wishes existed but currently cannot get.
This is a critical part of your ERP system requirements document. Reporting is often where ERP systems fail businesses the most. Getting specific here saves a lot of pain after go-live.
Step 8: List Your Vendor Evaluation Criteria
This part bridges your ERP requirement specification to the vendor selection process.
Once your requirements are clear, you need to know how you will judge vendors against them. Write a short set of criteria before you open any vendor conversation.
Think about these areas:
- Does the vendor have real experience in your industry?
- Can they show a live demo matched to your specific business ERP needs?
- What does their support and onboarding look like?
- What does the post-go-live relationship look like?
Having this list in your ERP requirements document keeps your evaluation process clean. You stop getting distracted by flashy features and stay focused on fit.
The ERP Requirements Document Template (Simple Version)
Here is a template structure you can follow. Fill in each section with your own business information.
Section 1 — Business Overview: Company name, size, industry, and the main goal of this ERP project.
Section 2 — Current System and Pain Points: What you use today, what it does well, and where it holds you back.
Section 3 — Functional Requirements: Split into must-have and good-to-have. Cover each department.
Section 4 — Technical Requirements: Integrations, hosting, user count, mobile access, data migration.
Section 5 — Compliance and Security: Industry rules, data standards, audit needs.
Section 6 — Reporting Needs: Key reports, dashboards, and analytics your leadership needs.
Section 7 — Budget and Timeline: Budget range and go-live target with major milestones.
Section 8 — Vendor Evaluation Criteria: How you will score and compare vendors.
This structure covers everything that belongs in a proper ERP requirement specification. You can expand each section as your team adds detail.
Common Mistakes Businesses Make With Their ERP Implementation Requirements
Even teams with good intentions get this wrong. Here are the most common ones.
Writing it once and never updating it. Your ERP requirements document should be a living file. As your team reviews vendor options, new questions come up. Update the document as you go.
Letting only one department lead the process. The finance team sees one version of the business. So does IT. So does ops. Your ERP system requirements document needs all of them to be complete.
Going too general on technical requirements. "We need it to connect with our current tools" is not enough. Name the tools. Describe the data flow. Be specific so vendors can give you honest answers.
Skipping the ERP migration checklist connection. Your document and your migration checklist should work together. If a requirement is on the document, there should be a step on the checklist to verify it gets met.
How Softhealer Makes Your ERP Requirements Work in the Real World
Writing the ERP requirements document is step one.
Getting a partner who actually delivers on those requirements is step two.
At Softhealer the team has worked with businesses across industries who came to Softhealer after bad ERP experiences.
The pattern is almost always the same. The requirements were unclear. The vendor made promises the system could not keep.
The Softhealer team works differently. The team sits with your team before the first demo. The team goes through your ERP requirement specification together. The team asks the hard questions early so there are no surprises after go-live.
Whether you are doing a fresh ERP migration or upgrading from an older version, Softhealer builds the solution around your actual business ERP needs. Not a one-size template.
Frequently Asked Questions
1. What is an ERP requirements document and why do I need one?
An ERP requirements document is a written list of everything your business needs from a new ERP system. Without it, you risk choosing the wrong software and wasting your entire implementation budget.
2. How long should an ERP requirement specification be?
There is no fixed length. It should be as detailed as your business needs. Most growing businesses end up with a document between 5 and 15 pages depending on complexity.
3. Who should write the ERP system requirements document?
It should not be just one person. Include leads from finance, operations, IT, and sales. Every department that will use the ERP should have a voice in the document.
4. Can the ERP requirements document change during the project?
Yes, and it should. As you talk to vendors and learn more about what is possible, update the document. Think of it as a living guide, not a locked contract.
5. How do ERP software requirements help with vendor selection?
They give you a clear scorecard. Instead of being swayed by a demo, you compare every vendor against the same list of requirements. It makes the decision much more objective.
6. What is the difference between functional and technical ERP implementation requirements?
Functional requirements are about what the system should do, like approvals, invoicing, or inventory tracking. Technical requirements cover how it should work, like integrations, hosting, and security.
7. Should I include budget in my ERP requirements document?
Yes. Adding a budget range helps vendors give you honest proposals. It also keeps your ERP project scope realistic from the beginning.
8. How does Softhealer use the ERP requirements document during implementation?
Softhealer reviews the document with you before any work begins. We use it to map your real business ERP needs to the right features so the final system actually matches what you asked for.
