Wild Bill's Muffler Shop employs mechanics to replace automobile muffler and exhaust systems for customers. The exhaust systems of certain vehicles are more complex than others and require more time to replace. Bill currently employs four mechanics. Their names have been disguised in this problem for confidentiality reasons.

Bill has been working on a program to improve the efficiency of his repair process. He would like to identify the best mechanics and help the others learn a few "tricks of the trade" from them.

Following are performance data collected by Bill:

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A. Prepare three bar graphs similar to Exhibits 9,10 , and 11 in this chapter. Assume larger numbers in the average repair difficulty column indicate more difficult repairs.

B. Evaluate your graphs.
C. What decisions might Bill make as a result of your analysis?

Transcribed Image Text:

Average Labor Cost Average Parts Cost Average Repair Difficulty Tom $80 June 65 Sam 90 Kate 78 $155 135 180 165 33 30 25 40