Exam 16: Quality Control and Spc

An airline found that on average, 0.62% of the luggage they received from passengers at LAX( Los Angeles Airport) is lost or damaged. On a typical day, 1000 pieces of luggage pass through this airport. The upper control limits for a p chart for monitoring the daily fraction nonconforming?

Which is not related to a discrete metric?

Explain and give the significance of the 1:10:100 Rule.

A bottling process sometimes results in overfills or underfills. Overfills are especially damaging to the equipment. Which process capability index would this company most want to monitor?

Common cause variation is

If the mean in the range chart shifts down significantly, it indicates that the variation in the process has decreased.

Explain the issues associated with selecting the appropriate sample size and sampling frequency for control charts.

Honda wants to monitor the number of blemishes scratches, blisters, etc.) on the fenders of its cars using a statistical process control chart. The most appropriate type of SPC chart is

Special cause variation tends to be easily detectable using statistical methods.

Both the p-chart and the c-chart use variable data.

Common cause variation

A production process is sampled 24 times with a sample size of 6 yields an overall mean of 25.2 and an average range of 0.8. Determine the control limits for the x-bar and R charts.

Which of the following is not related to a continuous metric?

With good management, all variability of output from any goods- or service-producing process can be eliminated.

If no special causes affect the output of a process, we say that the process is ____; when special causes are present, the process is said to be ____.

Indications in a control chart of an out-of-control situation include all of the following except

In the 1:10:100 Rule, which of the following would be correct?

An $\bar { x }$ -chart is always analyzed first because the control limits in the R-chart depend on the mean $\bar{ x }$ ) of the data.

A key element of a control system is the ability to measure performance and compare it to a performance standard.

Regarding special cause variability, all are true except