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Question
A refrigeration and heating companyone that installs and repairs home central air and heating systemshas asked your advice on how to analyze their service quality. They have logged customer complaints. Here's a recent sampling. Use the supplied template to construct a conventional cause-and-effect diagram. Place each of the complaints onto a main cause; justify your choice with a brief comment as necessary. 1. "I was overchargedyour labor rates are too high." 2. "The repairman left trash where he was working." 3. "You weren't here when you said you would be. You should call when you must be late." 4. "Your repairman smoked in my house."5. "The part you installed is not as good as the factory original." 6. "Your repairman was here for over two hours, but he wasn't taking his work seriously."7. "You didn't tighten some of the fittings properlythe system's leaking." 8. "Your estimate of repair costs was WAY off." 9. "I called you to do an annual inspection, but you've done morework that I didn't authorize."10. "Your mechanic is just changing partshe doesn't have a clue what's really wrong." 11. "Your bill has only a totalI wanted to see detail billing." 12. "Your testing equipment isn't very neware you sure you've diagnosed the problem?"13. "One of the workmen tracked mud into my living room."
Answer
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Related questions
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Weight Day
Package 1
Package 2
Package 3
Package 4 Monday
23
22
23
24 Tuesday
23
21
19
21 Wednesday
20
19
20
21 Thursday
18
19
20
19 Friday
18
20
22
20 (a) If he sets an upper control limit of 21 and a lower control limit of 19 around the target value of twenty ounces, the control chart is based on what value of z?
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Answer:
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