Builders merchant ERP migration guide
Changing the system that runs your merchant business is a big decision, and the cost of getting it wrong is downtime, lost data and frustrated staff. This guide covers how to plan an ERP migration, the traps to avoid and where an AI sales layer fits once your data is in good shape.
Why merchants change ERP
Most builders merchants do not migrate ERP for fun. They do it because the old system cannot keep up: no proper ecommerce, weak stock visibility across branches, clunky reporting, or a supplier winding a product down. The pull is usually the promise of live stock, tighter margins, better trade counter speed and a platform that can support online trade rather than fighting it.
The risk is that a migration touches everything at once, from pricing files and customer accounts to stock records and open orders. Handled well it is a step change. Handled badly it means a trade counter that cannot quote on go live day. The difference is almost always in the planning rather than the software itself.
How to plan the migration
Clean the data first
Migrations expose messy data. Deduplicate customers, fix pricing files and tidy stock records before they move, not after.
Map every process
Write down how the counter, credit control and buying actually work today, so nothing is quietly lost in the move.
Run in parallel
Where you can, run old and new side by side for a period so a problem never leaves you unable to trade.
Phase the rollout
One branch or one function at a time is safer than a big bang across the whole business on a single date.
Train before go live
Staff who learn the system the day it launches will be slow and unhappy. Train early and keep support close.
Plan the fallback
Know how you will keep quoting and taking orders if something slips, so a hiccup never becomes a lost day.
Where AI fits in a modern merchant stack
An ERP migration is the moment merchants think hardest about what good looks like. A modern stack is not just a new system of record, it is one that can sell around the clock. That is where an agentic AI sales agent comes in. Otis sits on top of your ERP, old or new, reads your live product, price and stock, and answers trade enquiries at any hour rather than letting them wait until the counter opens.
Because Otis is built to work alongside whatever system you run, you do not have to wait until a migration is finished to add it, and you are not locked to one ERP if you change again later. It is the sales layer that makes the data you just cleaned up actually win you more orders.
Common questions
How long does a merchant ERP migration take?
It varies widely with size and complexity, from a few months for a single branch to well over a year for a large multi branch group. Good data preparation shortens it.
What causes migrations to go wrong?
Almost always poor data and rushed timing. Dirty pricing and stock files, no parallel running and training left to go live day are the usual culprits.
Do I need to finish migrating before adding Otis?
No. Otis sits on top of whatever system you run today, so it can be added before, during or after a migration without being tied to one ERP.
Does OptiFlow run the migration for us?
No. We are the AI sales layer, not the ERP or the migration partner. We simply make sure the modern stack you build actually sells for you.
More from Otis
Modernising your merchant systems?
Talk to us about adding an AI sales agent that works on top of your ERP, whichever one you choose.