List every number a costing environment lets you change, resolved: what each factor is worth here, whether that is your own statement, one inherited from a parent environment, learned from your reported outcomes or the platform's default, the range a what-if may explore, which cost-sheet lines it moves, and the endpoint that saves it. Read this BEFORE proposing a change — a value outside a factor's band is refused, and a factor that drives no line of this part changes nothing. The environment id is on any calculation as costing_environment_id (also returned by arcnm_explain_cost and arcnm_cost_breakdown). Read-only.