Companies considering new cost=cutting manufacturing processes often compare the projected results of making the investment against the alternative of not making the investment with costs, selling prices, and share of market remaining constant. Which of the following, assuming that each is a realistic possibility, constitutes the most serious disadvantage for companies of using the method above for evaluating the financial benefit of new manufacturing processes? A The cost of materials required by the new process might not be known with certainty B In several years interest rates might go down, reducing the interest costs of borrowing money to pay for the investment C Some cost-cutting processes might require such expensive investments that there would be no net gain for many years, until the investment was paid for ny savings in the manufacturing process D Competitors that do invest in a new process might reduce their selling prices and thus take market share away from companies that do not E The period of year chosen for averaging out the cost of the investment might be somewhat longer or shorter, thus affecting the result
compare the projected results of making the investment against the alternative of not making the investment with costs, selling prices, and share of market remaining constant. 这是companies用来evaluate的方法 题目问的是，如果选项所说的为真，哪一个最能让这种evaluation的方法是有缺点的（完了我连中文都写不清楚了……）
costs,selling prices,share of market remaining属于“projected results”，但是C说的竞争对手的现象，他们在投资cost-cutting process的同时也用了其他的手段（即通过降低售价来提高市场占有率），而这种combination的最终结果，是会和projected results不同的。也就是说单纯用投资前的“projected results”来衡量一个投资是否只得做是不准确的。
另外还可以从这个角度看，如果所谓的“projected results”是建立在以前的case基础上（预测也要有个benchmark吧），而那些case因为投资引起的高市场占有率其实是因为加入了其他的marketing手段，那些结果本身就是在放大cost-cutting process investment能带来的效率。 从这种角度来讲也是不准的。
这句话的结构是compare A against B with precondition C。也就是：基于C条件对A和B进行比较。C就是“costs, selling prices, and share of market remaining constant.”，即“成本，价格，市场占有率保持不变”。A和B就是分别making investment和not making investment的情况下的两种project results。
这是数学建模过程中降低变量数量，从而简化计算模型的一个方法。成本，价格与市场占用率为此处试图常量化的三个变量。数学建模的过程最关键的就是这个减少变量数的过程是否合理。D中引入了一个证据证明了share of market会保持不变这个假设是无法成立的，从而成功的达到了weaken这个模型的目的。
这句话的结构是compare A against B with precondition C。也就是：基于C条件对A和B进行比较。C就是“costs, selling prices, and share of market remaining constant.”，即“成本，价格，市场占有率保持不变”。A和B就是分别making investment和not making investment的情况下的两种project results。
这是数学建模过程中降低变量数量，从而简化计算模型的一个方法。成本，价格与市场占用率为此处试图常量化的三个变量。数学建模的过程最关键的就是这个减少变量数的过程是否合理。D中引入了一个证据证明了share of market会保持不变这个假设是无法成立的，从而成功的达到了weaken这个模型的目的。
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发表于 2010-3-29 14:54:42
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谢谢！！！