Provide a single-state decision tree diagram with PW values for each level for the design alternatives.

The Ajax Corporation manufactures compressors for commercial air conditioning systems. A new compressor design is being evaluated as a potential replacement for the most frequently used unit. The new design involves major changes that have the expected advantage of better-operating efficiency. From the perspective of a typical user, the new compressor would have an increased investment of RM8,600 relative to the present unit, and an annual expense saving dependent upon the extent to which the design goal is met in actual operations.

Estimates by the multidisciplinary design team of the new compressor achieving four levels (percentage%) of the efficiency design goal, the probability and annual expense saving at each level are shown in Table Q4(b).

Based on a before-tax analysis (MARR = 18% per year, analysis period = 6 years, and salvage value = 0) and E(PW) as the decision criterion, is the new compressor design economically preferable to the current unit? Provide a single-state decision tree diagram with PW values for each level for the design alternatives.

Jadual S4(b)/Table Q4(b)