system areas reviewed
Code, data, integrations and operations are mapped as one working platform.
We review the current system, define the target architecture, plan migration stages and support cutover and stabilization within an agreed scope.
The engagement covers the current system, the target design, the migration sequence and the controlled switch to an accepted platform state.
Code, data, integrations and operations are mapped as one working platform.
The current, parallel and cutover states each have named checks and owners.
System map, dependencies, target decision, sequence, cutover record and accepted state.
Scope, owner, acceptance checks, stop condition and rollback procedure.
The review connects components, data paths, interfaces, deployment environments and responsible owners so the migration plan matches the system that actually runs.
Identify coupling, ownership and the components that cannot be moved independently.
Technology follows the migration requirements. We inspect the existing platform, then compare compatibility, support lifetime, security, operational fit, team capability and total ownership cost.
See the technologies we useSource structure, build files, scheduled jobs and release history show which components change and deploy together.
Used for the component inventoryStores, transformations, read and write paths, retention rules and ownership show what must remain consistent.
Used for the data dependency mapAPI specifications, file transfers, protocols, schedules and failure behavior show where systems depend on each other.
Used for the integration registerRuntime configuration, deployment history, incidents, change windows and owner input define the operating limits.
Used for cutover and rollback planningWe document the current system, select a target boundary, split the work into migration increments and verify each state before the next switch.
See the migration stagesRecord components, data movement, integrations, environments, constraints and responsible owners.
Output: current-state system mapDecide what stays, what separates, what becomes compatible and what must be replaced.
Output: target decision and incrementsImplement each increment, run the agreed checks, control cutover and document the accepted state.
Output: cutover and handoff recordEach stage produces a working record that another engineer or decision owner can review and continue from.
Components, data movement, integrations, infrastructure and known operating constraints.
Relationships that determine what can move independently and what must remain compatible.
The selected boundary, alternatives considered, technical reason and responsible decision owner.
Defined increments, prerequisites, checks and the condition for moving to the next state.
The switch window, acceptance checks, stop condition and route back to a known state.
What changed, what remains, who owns the state and what the next decision depends on.
Before work starts, the client and Bayna Studio record the baseline, target, measurement window and evidence source. The same fields are checked after acceptance.
Hosting, licences and recorded support effort
Stable cost after the agreed stage
Invoices, contracts, support recordsLead time and deployment frequency
The same measures after acceptance
Delivery and deployment recordsIncident and rollback time
Observed recovery to an agreed state
Incident timeline, acceptance checksPlanned interruption and rollback condition
The observed event and final state
Cutover log, signed acceptanceThe exact answer depends on the platform, but the service boundary is clear before technical access begins.
No. We compare staged extraction, compatibility work, parallel operation, partial replacement and a full rewrite against the dependency map.
The review identifies what must remain live, the available change window and the rollback condition. Those facts determine whether parallel operation is possible.
Define the platform area in scope, the known operating constraint, the decision owners and the acceptance criteria. Access remains limited to the written scope.
Implementation and stabilization can be included in the agreed scope. Indefinite operations and managed support are separate responsibilities and are not assumed.
We compare the recorded baseline with the accepted state over an agreed measurement window. Results are published only when the supporting records and client approval are available.
The system review, dependency register, target architecture, migration sequence and agreed implementation, cutover and handoff work.
Scoped access, existing technical records, operating constraints, responsible owners and acceptance criteria for each stage.
Tell us what runs now, what must change and what cannot stop.
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