ECO.3:4.3 - Test the contribution, then keep or change the proposal
Use the smallest attainable interaction that can change the next move: a discussion of terms, a matching offer, an illustrative sample, a conditional order or a limited use. A test has a purpose such as “can this party use the service in that window?” rather than “collect more evidence”. STR.7 helps decide whether such a test is worth its burden and how to bound it.
If the proposal is understood but not attractive, change the combination or counterparties, or stop. If it is attractive but a contribution is unavailable, return that condition rather than announcing an exchange. If an adequate attainable agreement already exists, proceed using the ordinary operating and contractual methods.
Return the next usable result in the working proposal. Preserve what the unsuccessful attempt revealed about another plan when it can improve the next search. Wider problematization and search remain with the existing FPF and Strategy methods.