Replacement is the expensive default
When an ERP frustrates people, the proposal that arrives is replacement: a multi-year, seven-figure programme with a high failure rate and a period of degraded operations in the middle.
Sometimes that is right. Often the actual complaints — no mobile access, poor reporting, no customer portal, rigid workflow — are gaps that can be filled around the system rather than by replacing it.
What is usually fixable around the edges
- Mobile capture for warehouse, field or shop floor, writing back into the ERP
- Customer or supplier portals reading and writing through an integration layer
- Reporting, by replicating data out to somewhere designed for querying
- Workflow and approvals, handled outside and recorded inside
- Document handling and extraction feeding structured data in
Each of these is weeks rather than years, and each addresses a specific complaint.
Find out what the ERP actually exposes
The feasibility question is what interfaces exist: a documented API, a supported integration layer, database access, or only file import and export. All four are workable; they differ in cost.
Ask your ERP vendor in writing what integration is supported and what it costs. The answer changes the project price more than any design decision, and vendors sometimes charge for API access.
Protect the ERP as the record of truth
Everything built around it should treat the ERP as authoritative for the data it owns. The failure mode is a satellite system that starts holding its own version of stock or orders, and then the two disagree.
Read freely, write deliberately, and never let a peripheral system become a second source of truth by accident.
When replacement is genuinely unavoidable
- The vendor has ended support and security updates have stopped
- The data model cannot express what the business now does, whatever you build around it
- Integration is impossible or priced punitively by the vendor
- The total cost of workarounds now exceeds the replacement over a realistic horizon
Note that three of those four are commercial rather than technical, which is usually the case.