Chapter 19 Graded Review Questions

1) A fishbone diagram is used to determine if a process is out of control. True or False

2) One purpose of quality control is to reduce the costs associated with producing and delivering poor-quality goods and services. True or False

3) There are two general types of causes of variations in manufacturing and service processes: chance and assignable causes. True or False

4) Assignable causes are usually large in number and random in nature, and they cannot be entirely eliminated. True or False

5) The purpose of a statistical quality control chart is to identify when assignable causes of variation have entered the production system so that the cause may be identified and corrected. True or False

6) Pareto charts are based on the 80-20 rule, which says 80% of the factors cause 20% of the problem. True or False

7) Quality control charts indicate whether a production process is in control or out of control. True or False

8) Control charts can be developed for both variables and attributes. True or False

9) Mean charts are designed to determine whether a process is in or out of control based on sample means. True or False

10) Proportion defective charts, which are also known as p-charts, show the percent of the production that is or is not acceptable. True or False

11) A c-bar chart shows the percent of the production that is defective. True or False

12) These are examples of attributes: the width of a cracked weld; the length of time that a relay works; the amount of water in a radiator; the diameter of a tire. True or False

13) In acceptance sampling, usually, 100% of the incoming lot is checked. True or False

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

15) In acceptance sampling, there is one unique operating characteristic curve for a specified sampling plan. True or False