How do you turn a PRD into an implementation roadmap?

How do you turn a PRD into an implementation roadmap?

An implementation roadmap orders work so each milestone creates usable evidence. It should expose dependencies and uncertainty rather than hide them behind dates.

Build thin end-to-end increments

Start with a small flow that accepts input, stores a job, and displays its status. Then connect one real generation step, followed by media assembly and retrieval. This can reveal integration problems earlier than completing every interface screen before testing the backend. Use realistic fixtures only where a dependency is deliberately deferred.

Attach exit criteria

For each milestone, state what can be demonstrated, which checks must pass, and which assumptions remain unresolved. Schedule a short feasibility experiment before a milestone that depends on uncertain provider behavior. Keep optional polish separate from blockers. Review progress by running the promised flow, not by counting files or generated lines of code. Update the roadmap when an experiment changes the expected effort or scope.