Replacing a core banking platform is one of the most consequential decisions a financial institution will make. The temptation is to treat it as a technology project — but the institutions that succeed treat it as a multi-year operating model change with technology at the center.

Start with the operating model, not the modules

Before any configuration decisions are made, leadership needs alignment on what the bank wants to be different on the day after go-live: faster product launches, lower unit economics, new customer segments, or all of the above. That clarity becomes the design authority for every later decision.

Phase by capability, not by module

We typically recommend phasing along customer journeys — deposits, lending, payments — rather than by Temenos module. It keeps the business engaged at every release and gives executives something tangible to communicate externally.

Hypercare is part of the plan, not an afterthought

The riskiest period is the first 90 days after go-live. A structured hypercare model — with embedded engineering, daily triage and a clear exit definition — protects both the customer experience and the program's credibility.