Both A and D look attractive.
A) says the costs of materials required for the new process are not known for sure. This does present some problems for the comparison between investing and not investing in the new process. However, one can give an educated guess of the range of costs thereof and compare the best and worst scenarios to get a sense of the plan.
D), on the other hand, introduces a new problem -- competitors! Their involvement might drastically change the assumed constant selling prices and share of market when the companies using the aforementioned method to evaluate the benefits of NOT making the investment. Thus the evaluated financial benefit of the new process, thus calculated using the mehtod, is INCORRECT, because its benchmarks are not CONSTANT when not making the investment.
So D is the best choice.
-- by 会员 sdcar2010 (2011/1/1 22:50:31)