Exam 19: Statistical Process Control and Quality Management

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 six tubes is taken every three hours and weighed with the following results: What is the value for the lower control limit (LCL)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. What is the UCL?

If a company reports that its quarterly earnings will be between $100 million and $125 million depending on the consumer demand,consumer demand is an example of ________ variation.

What is usually developed to evaluate a sampling plan?

If a company reports that its quarterly earnings will be between $100 million and $125 million,the range is an example of ________ variation.

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

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. What is the LCL?

What is the process that ensures that a company is producing a quality product or service?

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

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples,ΣX = 15,350 and ΣR = 411.4. To construct a mean chart,what is the value for R-bar used to compute the limits?

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 six tubes is taken every three hours and weighed with the following results: What is the value of A2,the control limit factor for averages?

Random samples of four items are selected from a manufacturing process at regular intervals and a certain quality characteristic is measured. After 25 samples, = 15,350 and = 411.4. How many samples were collected?

What process investigates the potential causes of an outcome or effect such as poor quality?

Cappelli Inc. designs and manufactures women's apparel using material from various mills. Their acceptance sampling plan states that 20 two-inch squares of the incoming material must be carefully checked. If 3 or less squares reveal imperfections,the lot is accepted. What is the probability that an incoming lot from Blufton Mills that contains 40 percent imperfect cloth will be accepted?

A diagnostic chart used to identify sources of variation,where the number and types of defects are tallied,is referred to as a(n)________.

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. What is the average percent defective?

Consider a situation where the lower control limit of a percent defective chart is negative. It must be that ________.

Percent defective charts,which are also known as p-charts,show the percent of the production that is or is not acceptable.

Which of the following statements about in-control and out-of-control processes are true? I. The mean chart and range chart always show that processes are in control. II. A mean chart can be in control,while a range chart can be out of control. III. A mean chart can be out of control,while a range chart can be in control.

Samples of 200 parts were taken every day and the number of defectives was counted. What are the upper and lower limits for the percent defective chart?