B的正面论证：
　　B： “最低工资不变的时候，失业率上升”说明失业率上升可能另有他因。这个论证的说服力不是很强，所以该题用排除法更有效。注意：削弱只是降低推理成立的可能性，而不需要推翻原文逻辑
　　“Fast cycle time” is a strategy of designing a manufacturing organization to eliminate bottlenecks and delays in production. Not only does it speed up production, but it also assures quality. The reason is that the bottlenecks and delays cannot be eliminated unless all work is done right the first time.
　　The claim about quality made above rests on a questionable presupposition that
　　(A) any flaw in work on a product would cause a bottleneck or delay and so would be prevented from occurring on a “fast cycle” production line
　　(B) the strategy of “fast cycle time” would require fundamental rethinking of product design
　　(C) the primary goal of the organization is to produce a product of unexcelled quality, rather than to generate profits for stockholders
　　(D) “fast cycle time” could be achieved by shaving time off each of the component processes in production cycle
　　(E) “fast cycle time” is a concept in business strategy that has not yet been put into practice in a factory
　　本着“先读问题，再看原文”的原则，首先发现是假设题(标志很明显：rest on a questionable presupposition; 不必理会questionable这个词)。然后又发现原文很绕，其中好像有两套逻辑，比较麻烦；那就看选项吧，毕竟考场上时间有限。
　　我们先用无关项排除法分别审视这五个选项：
　　(A) 所涉及的概念，无论bottleneck还是delay都出自于原文，所以先行保留
　　(B) 当看到最后的“product design”后，对它不抱希望了，原文实在没有产品设计方面的任何信息
　　(C) 看到最后的“profits for stockholders”，禁不住笑了，这不瞎扯吗？与原文无关啊。
　　(D) 其中的component 与原文无关了，就可以排除；再者该项的主旨是节省时间，这又犯了答非所问的错误(问题关心的是“quality”,而与时间无关)
　　(E) 其中的“put into practice又是瞎操心，立即排除。
　　考虑到B,C,D,E都不可能对，这样就确定A为答案了；一道很困难的题就这样被无关信息排除法轻松解决了
　　当然这道题还一种更便捷的做法 ---- 难题猜A，这个技巧使用起来很潇洒，但正确率只有less than 50%
　　为了更好滴理解无关信息排除法的强大，我们来看看正面论证A正确是多么的不易

GMAT逻辑解题关键：无关信息排除法_GMAT资讯
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