For CTOs: Architecture & Technical Lifecycle
Lifecycle starts with a decision record that freezes problem statement, data owners, and success tests. Governance beats clever models when production stakes include food safety and line stoppage. Discovery spikes confirm connector feasibility and sample quality before staff is booked long-term. Architecture review covers tenancy, secrets, network boundaries, and rollback story. Only then does detailed design open. Build runs in thin vertical slices that ship a working path early. Feature pipelines, training jobs, and serving endpoints stay versioned together. Model cards travel with every candidate and list limits in plain language. Promotion requires green data tests, drift smoke checks, and business sign-off. Canary or shadow stages absorb surprise before full traffic. Trade-offs surface around latency versus cost and accuracy versus explainability. Floor alerts favor simple models with fast features when minutes matter more than a tiny score lift. Overnight plans can accept heavier compute. We document those choices so future CTOs inherit reasons, not mysteries. Observability hooks are mandatory gate items, not a later phase. Operations handoff includes runbooks, on-call charts, and budget alarms wired to the same channels as services. Ownership matrices name who rebuilds labels when product codes change. We schedule drift reviews rather than waiting for complaints. Infrastructure stays in code so disaster recovery is a rehearsed checkout, not a scramble. The lifecycle ends when your team can change thresholds without us in the room. Integration debt is the usual killer. We prefer your existing identity provider and ticket system instead of new portals. Payload-style role models we have used for department hubs translate directly into AI admin surfaces. That keeps SSO, audit, and onboarding consistent. CTOs get one control plane instead of three fragmented admin tools.