As control involves both mechanistic and human elements, it is one of the managers most difficult tasks. Which of the following is the best answer about desirable characteristics of control systems?

Select one:

A. Should be as simple as possible to operate and maintain

B. Should signal managers if they go out of order

C. Should be focused and admit the least amount of variation

D. Both A and B

Which of the following is false regarding statistical sampling for control purposes?

Select one:

A. The more samples are taken, the higher the likelihood of accidentally selecting a sample with excessive values when the process actually is still under control

B. Deciding what indicators are high or low enough to be considered out of control is the simplest of the problems facing operation managers

C. Measuring upper and lower control limits are the basis for management by exception

D. Using high thresholds for control increases the risk of not detecting processes that are getting out of control

Which of the following is not a step in constructing control charts?

Select one:

A. Initial samples of the process to be monitored need to be taken

B. Means and ranges for the samples must be calculated

C. Deriving the means by the ranges previously calculated

D. Graphing sample means and ranges chronologically

Which of the following distributions can best represent the number-of-defects c chart?

Select one:

A. Dichotomous

B. Poisson

C. Binomial

D. Chi square