Suppose your manager presents you with the following information about machines that could be used for a job, and wants your recommendation on which one to choose. The specification width is .48 mm. In this instance, you can narrow the set of choices, but you probably wouldn't make a recommendation without an additional piece of information. Machine Cost per Unit ($) Standard Deviation (mm) A 19 .049 B 12 .060 C 12 .068 D 10 .064 Process Cp a b c d