b. Estimate the mean and standard deviation of the process. What are the ± 2 standard deviation limits for the individual data?
c. If the specification limits are 41 ± 5, do you think the process is capable of producing within these specifications?
Answer to relevant QuestionsTable 5E.3 presents 20 subgroups of five measurements on the time it takes to service a customer. b. Following establishing of the control charts in part (a), 10 new samples have been provided in Table 5E.4. Plot the new ...Discuss type I and type II errors relative to the control chart. What practical implication in terms of process operation do these two types of errors have? In exercise a. Estimate the potential capability of the process. b. Estimate the actual process capability. c. How much improvement could be made in process performance if the mean could be centered at the nominal value? Discuss the logic underlying the use of three-sigma limits on Shewhart control charts. How will the chart respond if narrower limits are chosen? How will it respond if wider limits are chosen?
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