An application migration cutover checklist should name every production action, its owner, prerequisite evidence, observable result, rollback trigger, and safe reversal instead of reducing the release to a deployment command.
Tie each action to a verified prerequisite
A cutover begins before traffic moves. The checklist confirms that the target build is reproducible, configuration names exist, secret values are placed by the buyer, data compatibility is understood, identity callbacks are registered, background jobs are controlled, observability is live, and critical-path smoke tests pass in a production-like environment.
Each line needs an owner and evidence link. A checkbox that says database ready carries little information, while a line that names the migration version, control total, validation query, owner, and result can support a release decision. The same precision applies to DNS, queues, webhooks, scheduled jobs, and third-party callbacks.
Write the traffic sequence and stopping conditions
The release sequence states when writes stop or remain dual, how queued work drains, where traffic changes, which smoke tests run first, and what metrics must remain within an accepted range. AWS recommends testing before transition and moving workloads in stages, which keeps a failed assumption from reaching every user at once.
A rollback trigger should be observable and time-bounded. Examples include identity failure above an agreed threshold, missing writes, queue growth, unexpected error rate, or a critical integration that cannot complete. The checklist names who calls the rollback and the last reversible point before each action.
Close the cutover with ownership evidence
After traffic moves, the team records smoke-test results, data control totals, error and latency observations, unresolved exceptions, and the time when rollback protection ends. The old platform is retired only after the buyer confirms the observation period and recovery requirements. The completed record becomes the basis for the editor and operator runbooks rather than disappearing in a release chat.
Where the service stops
Reality Contact, LLC prepares and validates the migration, but does not choose the buyer's target platform, receive secrets through the public form, approve downtime, change DNS, move production data, or initiate the final cutover without the buyer's authorization. The buyer supplies target decisions and scoped access, places production secrets, approves the verified release window, and executes or authorizes the final production cutover and any rollback. The work is software implementation and operational documentation, and it does not replace security, legal, compliance, or business-continuity advice. The buyer retains production credentials, approves downtime and data handling, and authorizes every cutover, traffic, DNS, and rollback action.
Sources: AWS application migration overview; Microsoft Cloud Adoption migration guidance.