A dominant mainframe vendor's licensing costs were set to quadruple with no capping mechanism. An immovable programme deadline with zero rollback capability meant the cutover had to succeed first time. MooodyCow mobilised seven mainframe specialists in five days, delivered two production cutovers ahead of schedule, and kept the ISV exit 100% on track to a hard commercial deadline.
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A dominant mainframe vendor's licensing costs were set to quadruple, with no capping mechanism available and no extended support fallback. The programme deadline was immovable and carried real commercial penalty, with zero rollback capability — the cutover had to succeed first time. Critical specialist skills were scarce across the market, as the industry had largely migrated away from the relevant product stack. The client also faced decades of automation debt, knowledge gaps across teams, and multiple interdependent systems requiring simultaneous replacement.
MooodyCow mobilised seven specialists within five days of the brief: migration SMEs, automation engineers, systems programmers, a Project Manager and PMO function. SMEs were embedded from day one. The environment was assessed, parallel tracking structured, and two production cutovers were delivered ahead of schedule.
Legacy automation rules and executables were converted at pace. Governance frameworks were introduced to protect delivery quality and maintainability. Replacement tooling was installed, configured and teams were trained end-to-end, keeping the ISV exit fully on track with zero disruption to live operations.
Outcome: The ISV exit was delivered on track to a hard commercial deadline with zero disruption to live operations. The 4x licensing cost uplift risk was fully mitigated. Two production cutovers were completed ahead of schedule, and the client's teams were equipped with the governance frameworks and trained on replacement tooling to maintain operations independently.
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