EP114: Core banking implementation - Changing engines at 30,000 feet

Core banking transformation is often compared to changing an aircraft engine mid-flight, as banks must replace their core systems without disrupting live operations or customer experience. Successful implementation depends on disciplined execution across multiple critical phases. The journey begins with rigorous programme planning, defining activities, dependencies, milestones, ownership, timelines, and communication to ensure a single, aligned plan. Customisation must be tightly controlled, limited only to regulatory, regional, or high-impact needs, as excessive tailoring increases risk. Data migration is a long, complex track requiring multiple mock runs to ensure accuracy and a smooth final cutover. Parameterization captures each bank’s unique products, processes, and accounting nuances within the system. Testing is the defining phase, encompassing system integration, user acceptance, performance, and security testing. Training is equally critical, focusing on both learning the new system and unlearning old practices through hands-on simulations. Finally, go-live readiness must be objectively assessed, as long-term success depends on post-implementation user experience, not just a smooth cutover.