Short answer
Keep your ERP (enterprise resource planning) system and add an AI layer if its records are accurate. Quoting, scheduling, and job tracking are usually the parts still in spreadsheets and email. Replace it when it can't connect to other tools, is no longer supported, or can't handle how your business now operates. Lattice Partners is an AI implementation partner based in Los Angeles and New York. We help companies build an AI strategy, train their employees on AI tools, and build custom agents and software.
- An AI layer reads from and writes to your ERP. It doesn't replace it.
- Replacing an ERP is a business decision. Adding an AI layer is a software project.
- Check what your current license already includes before you buy or build anything.
What is an AI layer on top of an ERP?
An AI layer is a custom tool that sits next to your ERP, reads its data, adds information from outside it, and writes results back. It covers the work your ERP doesn't do well. Examples are quoting from old quotes and drawings, scheduling against written shop rules, and reading purchase orders from email.
The ERP stays the system of record. NetSuite is one example of how this works. Oracle's documentation says its REST web services let an outside application create, read, update, and delete records.
Typical AI layer tools for fabricators include automated order entry and quoting. Other ERPs, such as Epicor, Acumatica, and JobBOSS, have their own integration options, so check what yours supports.
When does it make sense to keep your ERP?
Keep your ERP when it does its core job and the problem is the work around it. The core job is inventory, orders, purchasing, and accounting. If those records are mostly right, replacing the system won't fix the spreadsheets next to it.
These signs point toward keeping it:
- People keep spreadsheets next to the ERP for quoting or scheduling.
- The same information gets typed in twice.
- You were told you'd need another module for each new workflow.
- Your inventory and customer records are mostly accurate.
When does it make sense to replace your ERP?
Replace your ERP when the system itself is the limit. An AI layer can't fix a system that has no way to connect, and it produces poor results when the underlying records are wrong.
Common reasons to replace:
- The vendor no longer supports your version.
- The ERP has no API or import feature, so nothing can read from it or write to it.
- You've added sites, legal entities, or compliance requirements the system can't handle.
- Core records, such as inventory counts or bills of material, are too wrong to trust.
If your records are wrong, fix them first. That's true whether you replace the system or add to it.
How do the two paths compare?
The table shows how the situations map to each path.
| Situation | Keep ERP and add an AI layer | Replace the ERP |
|---|---|---|
| ERP records are mostly accurate | Fits | Not needed |
| Pain is quoting, scheduling, tracking, or data entry | Fits | More than the problem needs |
| ERP has an API or import feature | Fits | Not needed |
| ERP can't connect to anything | Limited | Worth considering |
| Vendor has ended support | Short-term fix | Worth considering |
| New sites, entities, or compliance needs | Doesn't solve it | Worth considering |
| Core data is wrong | Fix the data first | Fix the data first |
How do the costs compare?
An ERP replacement costs a license, an implementation, and the time your team spends moving data and learning a new system. An AI layer costs a one-time build and whatever upkeep you choose.
On licensing, NetSuite says customers subscribe for an annual license fee made up of the core platform, optional modules, and the number of users. Other vendors package things differently, so ask each one for the total in writing. For the add-on module version of this decision, see custom AI versus your ERP's add-on module.
Typical market ranges for a custom AI tool are $5,000 to $100,000 per project.
What should you check before deciding?
Check five things before you decide:
- What your current license already includes. You may own a quoting or scheduling feature you haven't turned on.
- Whether the ERP has an API or an import feature.
- How accurate your item, customer, and inventory records are.
- Which workflows live outside the ERP today, and who runs them.
- Who will maintain a custom tool after it's built.
"If the ERP holds your inventory and your books correctly, I'd leave it alone and build around it. If nothing can connect to it, that's a different conversation."
Christian Yeghnazar, Co-Founder and Managing Partner, Lattice Partners
How Lattice Partners does this
We don't ask you to replace your ERP. We build custom quoting, scheduling, job tracking, and order entry tools for metal fabricators and job shops that connect to the ERP you already run. If a new ERP is the right answer, we say so.
We start by learning how your team works and which records you trust. Then we write down your rules with you and build the tool. We aim to ship a first version within a few weeks and improve it over 2 to 3 rounds from real use. It's a one-time build. You own the code, with no per-seat or per-module license from us.
Frequently asked questions
Can I add AI to my ERP without replacing it?
Yes, if the ERP has an API or an import feature. The AI tool reads your records, does its work, and writes the results back, so your ERP stays the system of record.
Does a custom AI tool lock me in to the builder?
No. You own the code, so you or another developer can maintain it. Lattice Partners can stay on after launch if you want support.
What if my ERP data is messy?
An AI tool can read old quotes, PDFs, and spreadsheets that your ERP doesn't hold. Core records like inventory and customers still need to be mostly right, so clean those first.
How long does it take to add an AI layer?
A first version usually ships in a few weeks. The full timeline depends on how many workflows you start with and how your ERP connects.
Should I wait for my ERP vendor to add AI features?
Check what the vendor's AI features cover and what they cost. If they match your workflow, they may be the simplest choice. If your rules are specific, a custom tool may fit better.
Related reading
About Lattice Partners
Lattice Partners is an AI implementation partner based in Los Angeles and New York. We help companies build an AI strategy, train their employees on AI tools like ChatGPT and Claude, and build custom AI agents and software. Clients own the code we build. Lattice Partners was founded by Colin McDonnell, Martin Anquetil, and Christian Yeghnazar. Contact us to talk about your use case.