Manufacturing · United Kingdom
Modernising a business-critical legacy platform
A staged modernisation of a legacy enterprise application while operations continued without interruption.
Challenge
The challenge
A core operational system had grown difficult to change, depended on undocumented customisations and carried risk with every release, but could not be taken offline.
Context
The context
The system encoded years of business rules that were still correct. The objective was to preserve that logic while removing the architectural constraints around it.
Solution
Our approach
- 01 Assessed the application, its data model, integrations and business rules
- 02 Extracted and documented implicit logic embedded in legacy customisations
- 03 Introduced an integration and API layer to decouple dependent systems
- 04 Modernised incrementally, module by module, behind stable interfaces
- 05 Established automated regression testing to protect behaviour during change
Implementation
How it was delivered
Delivered as a sequence of reversible steps rather than a big-bang replacement, with the legacy and modern components running side by side during transition.
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