ECO.2:4 - Solution

ECO.2:4.1 - Establish the changed exchange

Compare like terms: unit, specification, quantity, time, location, payment and access. Determine which part changed and which obligations already fix the price for the current work. Include a consequential service or supply condition even when the quoted money amount stays constant.

Ask whether the change applies at the margin of the contemplated action. A cheaper bulk offer may require more storage than is available. An average historic price can be irrelevant to the next attainable unit. ECO.1 supplies a missing interpretation.

ECO.2:4.2 - Construct feasible responses

Use knowledge of the actual work to consider the responses that could matter: use less per result, substitute another input, change timing or output, increase supply, or keep the present use.

Carry each response through its material complements. A replacement input can require another tool, skill, inspection or delivery arrangement. Price alone cannot establish that the substitute performs the needed function. If the substitute’s function is unresolved, use SYSE.9 to obtain and apply the needed specialist result—for the packaging case below, whether the insert protects the product under its handling conditions. OPS.14 compares the operating alternatives and their transition costs; MA.1 constructs a missing resource-use account; FIN.6 supplies an investment comparison when the response entails a longer commitment. Use only the contribution the present decision lacks.

Compare the attainable net effects over the relevant period, including transition and forgone uses. Retain differences in performance and affected interests alongside the monetary comparison.

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.