TLDR Tech / Fintech
Where a core banking overrun actually goes: what the primary record says
WislaCod's CEO argues that core banking programmes don't go over budget because of the ledger. The cost comes from the "seams" around it: platform decisions, migration timing, integration, testing, and unmanaged vendor chains. RTGS came in £56M over budget, and TSB's failed migration came down to a login misconfiguration and poor visibility into 85 subcontractors, not the data migration itself.
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