Exam 19: Statistical Process Control and Quality Management

What is another name for the p-bar chart? ______________

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 50 pairs of shoes will be accepted only if the number of defective pairs of shoes in a sample of 5 pairs is two or less. Based on the sampling plan, what is the probability of accepting the delivery of 50 pairs of shoes if the actual percent defective is 0.40?

In what decade were the concepts of statistical quality control developed? _________

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 the value of the lower control factor of the range?

A new machine used in the production of motor mount bolts was put into operation. Five samples of size 100 were randomly selected and the number of defectives in each sample was noted. The measurement of quality is based on

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 the lower control limit for the mean?

There are two general types of causes of variations in manufacturing and service processes: chance and assignable causes.

A Pareto chart is useful because it is based on the theory that 80% of the observations are accounted for by 20% of the ________.

A quality control chart is used to monitor the customer wait time at a local call center. Sample means of five times are averaged and plotted over time. The last five sample means show a trend of decreasing sample means. The process is

What chart helps to identify the relatively few factors that impact the performance of a manufacturing or service process?

An airline is investigating the causes of lost bags. The following table of data was collected over the last six months. What is the reason with the highest percentage of bags is lost, and what is the percentage?

A manufacturer of cell phones counts the number of defective phones in an eight hour shift. Over the last ten days, the number of defective shafts per eight hour shift has been reported. To construct a process control chart for the mean number defective, what is the upper control limit?

The measurement of color is an _____________.

A fishbone diagram is an ________________ tool.

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. What is the upper control limit (UCL) for the mean chart?

Random samples of 4 items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples, $\Sigma$ X = 15,350 and $\Sigma$ R = 411.4 To construct a range chart, what is the upper control limit (UCL) for the range?

Pareto charts are based on the 80-20 rule, which says, 80% of the factors cause 20% of the problem.

Random samples of 4 items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples, How many samples were collected?

Which chart portrays the number of defects per unit of production? _____________

An airline is investigating the causes of lost bags. The following table of data was collected over the last six months. What is the reason with the lowest percentage of bags is lost, and what is the percentage?