Custom ERP Development & Legacy System Modernisation
ERP has a reputation for expensive, multi-year programmes that disrupt the business and land late. That reputation is largely earned — but it comes from monolithic implementations, not from the idea of integrated operational software.
Biztreck takes a modular approach. We build and roll out one operational area at a time — inventory, purchasing, production, dispatch — each delivering value on its own while sharing a common data model. You modernise without betting the business on a single go-live.
The problem
A legacy system nobody can safely modify and few people still understand
Inventory counts on screen do not match the warehouse
Purchasing, production and sales each keep their own version of the numbers
Reporting requires an export and a spreadsheet specialist
The current ERP licence costs more each year for features you never use
New locations or product lines cannot be added without vendor consulting fees
What it costs your business
Working capital tied up
Inaccurate stock data forces over-ordering and buffer inventory you do not need.
Operational firefighting
Managers spend the day chasing information instead of improving throughput.
Modernisation risk
Fear of a big-bang migration keeps you on a system that gets riskier every year.
Vendor lock-in
Every change requires the vendor, at their price and on their timeline.
Our solution
We start with the module where the pain and the payback are highest — usually inventory accuracy or purchasing — and ship that first, running alongside the legacy system rather than replacing it overnight.
Each subsequent module plugs into the same data model. Migration happens gradually, with both systems reconciled during transition, so there is never a single day where the business is betting everything on a cutover.
What you get
Inventory & stock control
Real-time stock positions across locations, with movements, adjustments and counts.
Purchasing & suppliers
POs, approvals, goods receipt and supplier performance in one place.
Production & jobs
Scheduling, work orders, materials consumption and QA checkpoints.
Sales & dispatch
Orders, allocation, picking, dispatch and delivery confirmation.
Finance integration
Clean handoff to your accounting platform rather than a second ledger.
Operational reporting
Live dashboards for stock, throughput, margin and on-time delivery.
How we work
Operational audit
Map current systems, data quality and the true cost of today's process.
Module roadmap
Sequence modules by payback so early phases fund later ones.
Core data model
Design the shared foundation every module will build on.
Phased build
Ship one module at a time, running parallel to legacy where needed.
Migrate & decommission
Move data gradually, reconcile, then retire the legacy system.
Technology we use
Business outcomes
Accurate, real-time stock and operational data
Modernisation delivered without a high-risk big-bang cutover
Reduced licence and vendor-consulting spend
Ability to add locations and product lines in-house
Case study
Business challenge
A distributor ran a decade-old system that could not handle a second warehouse. Stock accuracy was poor, causing both stockouts and excess inventory, and the vendor quoted a large fee for multi-location support.
Solution
A modular ERP starting with multi-location inventory and purchasing, integrated with the existing accounting platform, later extended to dispatch and supplier performance.
Timeline
Phase one in 12 weeks, full rollout across 3 phases in 9 months
Business results
- Accurate stock visibility across both warehouses
- Reduced buffer inventory and fewer stockouts
- Second location supported without vendor fees
- Legacy system retired without a disruptive cutover
Frequently asked questions
Is custom ERP really cheaper than SAP or NetSuite?
Not always, and we will say so. Custom tends to win when your operation is unusual, when you need only a few modules, or when licence plus customisation costs on a large platform exceed building what you actually need. We compare honestly during the audit.
How risky is replacing our legacy system?
Big-bang replacements are risky, which is why we do not do them. Modules run alongside the legacy system and take over one area at a time, with reconciliation during transition.
How much does custom ERP cost?
A first module typically runs USD 25,000-60,000. Full multi-module programmes are larger but are phased so each stage delivers value and can be paused.
Can it work with our accounting software?
Yes, and we usually recommend it. Keeping your proven accounting platform and integrating with it is lower risk than rebuilding a general ledger.
What about our existing data?
Data migration, cleansing and reconciliation are explicit workstreams. Poor legacy data quality is common, and we surface it early rather than at go-live.
How long before we see value?
The first module is deliberately chosen for fast payback and typically ships in 10-14 weeks, rather than waiting a year for a full programme.
Related solutions
Let's build software that grows your business
Book a 30-minute strategy call and we will map where erp development would remove the most cost from your operation — no obligation, no pitch deck.