Exam 19: Statistical Process Control and Quality Management

The Quality Assurance Department selected 12 samples of 100 printed circuit boards and tested them. The number of defective printed circuit boards in each sample was 3, 3, 0, 5, 1, 1, 5, 6, 6, 2, 0, and 1. What kind of control chart should be constructed to monitor the process?

In a control chart, expected variation is defined by the

A sampling plan states that if 20 incoming bolts are checked and 2 or less defective bolts are discovered the lot will be rejected. If an incoming lot is 10 percent defective, what is the probability of rejecting the lot?

A fishbone diagram starts with the definition of a problem and explores its possible ________.

The Quality Assurance Department selected 12 samples of 100 printed circuit boards and tested them. The number of defective printed circuit boards in each sample was 3, 3, 0, 5, 1, 1, 5, 6, 6, 2, 0, and 1. The measurement of quality is based on

A new printing machine is set or calibrated to print 25 copies per minute. On each of four days, the printer's output is measured five times. The data will be used to construct a process control chart to monitor the printing process. The results of the printing process are in the following table. To construct a range process control chart, what is the mean range?

What is the "in control" region of a control chart called? ____________________

A major distributor buys shoes from a supplier. The distributor randomly samples the shoes to inspect for quality. The distributor's specifications state that a delivery of 100 pairs of shoes will be accepted only if the number of defective pairs of shoes in a sample of 10 pairs is two or less. Based on the sampling plan, what is the probability of accepting the delivery of 100 pairs of shoes if the actual percent defective is 0.80?

Acceptance sampling and control charts may be based on measurements with either ______________ or ___________________.

A large restaurant contracts with a local laundry to wash white napkins. The laundry returns the napkins in bundles of one-hundred napkins. The restaurant uses a sampling plan to make a decision to use the bundle of napkins or return the bundle to the laundry. The sampling plan uses a sample size of ten with a "number of rejects allowed" of one. If the number of dirty napkins in a sample of ten is two, what decision is made?

Control charts are used to determine if a process is

One of the most important concepts of statistical process control is that no two products are ________________.

A new machine is set or calibrated to fill tubes of toothpaste at precisely 6.75 ounces. Then, once the machine is running, a sample of 6 tubes is taken every three hours and weighed with the following results: What is X bar for 7 am?

A Pareto chart is typically skewed to the ________________.

A large restaurant contracts with a local laundry to wash white napkins. The laundry returns the napkins in bundles of one-hundred napkins. The restaurant randomly samples ten napkins to make sure that the napkins are clean with no stains or other defects. The restaurant is using a method called

In acceptance sampling, if the number of defects in a sample is less or equal to the acceptance number, then the incoming lot is accepted.

A large restaurant contracts with a local laundry to wash white napkins. The laundry returns the napkins in bundles of one-hundred napkins. The restaurant randomly samples ten napkins from each bundle to make sure that the napkins are clean with no stains or other defects. By sampling only ten of the napkins, the restaurant may conclude that the all the napkins are clean and use the bundle, but the napkins are actually dirty and should not be used. This sampling risk is called

A range chart shows variation of ____________.

What chart portrays the number of defects per unit? ____________

A major distributor buys shoes from a supplier. The distributor randomly samples the shoes to inspect for quality. The distributor's specifications state that a delivery of 100 pairs of shoes will be accepted only if the number of defective pairs of shoes in a sample of 10 pairs is two or less. Based on the sampling plan, what is the probability of accepting the delivery of 100 pairs of shoes if the actual percent defective is 0.00?