ECO.2:4.3 - Match the response to what remains unknown

For a small reversible change, an applicable current offer and adequate functional account may suffice. For a dedicated plant or long commitment, ask which uncertainty about persistence, access or substitution could reverse the decision. Seek only the information that can change that commitment, or retain a conditional plan.

A price rise can arise from supply loss, demand growth, altered quality, taxes or market power. Identifying the cause matters when it changes the chosen response; otherwise the current attainable terms can already justify using less or substituting. Return the chosen response and the event that would reopen it, in the ordinary working plan.