ECO.2:1 - Problem frame

Use this pattern when a changed price or offer can alter how you use, substitute or supply a resource. Begin by identifying the exchange whose terms changed. Compare the feasible response with keeping the present plan. The useful result is an adjustment, or a reason to leave the plan unchanged, with the condition that would change that answer.

A complete account of why the market changed is needed only when it affects the response. A routine purchase already covered by an adequate operating rule can stay with that rule.