Plateaus and Work Packages as transformation-control mechanisms

The decision

Represent intermediate states as plateaus and associate explicit Work Packages with movement between them.

Why it mattered

A roadmap showing only AS-IS and TO-BE hides temporary operating states, dependencies, and ownership.

The trade-off

Modeling intermediate states adds discipline and roadmap maintenance, but allows feasibility, risk, and dependencies to be evaluated before each transition.

What changed

Temporary states, dependencies, and decisions were no longer implicit inside a high-level roadmap.

The outcome

Implementation is not claimed; transition design remains in progress.

Summary of a documented architecture decision. Method, mechanism and supporting evidence are not published.