# Question: Bob said They must not be using quality control in

Bob said, "They must not be using quality control in automobile manufacturing. Just look at the J.D. Power data showing that new cars all seem to have defects."

(a) Discuss Bob's assertion, focusing on the concept of variation.

(b) Can you think of processes where zero defects could be attained on a regular basis? Explain.

(c) Can you think of processes where zero defects cannot be attained on a regular basis? Hint: Consider activities like pass completion by a football quarterback, 3-point shots by a college basketball player, or multiple-choice exams taken by a college student.

(a) Discuss Bob's assertion, focusing on the concept of variation.

(b) Can you think of processes where zero defects could be attained on a regular basis? Explain.

(c) Can you think of processes where zero defects cannot be attained on a regular basis? Hint: Consider activities like pass completion by a football quarterback, 3-point shots by a college basketball player, or multiple-choice exams taken by a college student.

## Answer to relevant Questions

A process has specification limits of LSL 5 540 and USL 5 550. The process standard deviation is 5 1.25. Find the Cp and Cpk capability indexes if (a) The process mean is 545; (b) The process mean is 543. In painting an automobile at the factory, the thickness of the color coat has a process mean of 1.00 mil and a process standard deviation of 0.07 mil. Twenty samples of five cars were tested, resulting in the mean paint ...A box of Wheat Chex cereal is to be filled to a mean weight of 466 grams. The lower specification limit is 453 grams (the labeled weight is 453 grams) and the upper specification limit is 477 grams (so as not to over fill ...Refer to the bolt strength problem 17.47. Assuming μ = 6,050 and σ = 100 with n = 3, then LCL 5 5,876.8 and UCL 5 6,223.2. Below are five sets of 20 sample means using n = 3. Test each set of means for the pattern ...Here are the ages of a random sample of 20 CEOs (chief executive officers) of Fortune 500 U.S. corporations. (a) Find the mean, median, and mode. (b) Discuss advantages and disadvantages of each of these measures of center ...Post your question