KCAE.COMPOSE:4.5 - Run the construction forward and return the alternatives

Use concrete case values or a minimally realistic example. Starting with the declared inputs, produce each intermediate result and verify that the next operation can consume it. This exposes missing identity mappings, transformations, conditions and capability assumptions that a backward diagram can conceal. A hypothetical execution explains the construction; an observed application supplies stronger use evidence and should be labelled separately.

Return the selected arrangement with its result, source grounds, joining operations and unresolved conditions. Include a meaningful alternative when the choice depends on cost or uncertainty the recipient must decide. If the only feasible continuation is obtaining a case fact or involving a qualified person, say so. Store reusable relations with the conditions and dependencies that made them valid. KCAE.CHANGE and KCAE.MEMORY can then reopen them when those conditions change.