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The principle disadvantage of fractional factorial experiments is that:

(Refer to the previous problem) The variance of the five replications for each run is calculated. Most of these variances are approximately equal but two are significantly lower than the others. The experimenters would be especially interested in those two runs if they want to optimize:

In a series of linked processes and associated feedback loops the product or service flows ________ and the information flows ________.

A team has been asked to reduce the cycle time for a process. The team decides to collect baseline data. It will do this by: