Summary for Chapter 10

Chapter 10 talks about the inspection process and why it's important to businesses. This chapter examines how quality control helps companies to keep up certain aspects of their business. It also talks more about inspections, where and how they need to be done in order to check on businesses. Quality control is a process that evaluates output relative to standard and takes corrective action when output does not meet these predetermined standard.


1) What are the typical inspection points in manufacturing?
a) Raw materials and purchased parts
b) Finished products
c) Before a costly operation
d) All of the above
Answer d) pg 460

2) What are the steps of the control process
a) Define, measure, compare, evaluate, monitor results
b) Measure, define, evaluate, compare, correct, monitor results
c) Evaluate, define, measure, compare, correct, monitor results
d) Compare, define, correct, measure, evaluate, monitor results
Answer a) pg 465

3) Which one of these following are defined as control limits:
a) Established by engineering design or customer requirements.
b) The natural or inherent variability in a process measured in terms of the process standard deviation
c) Statistical limits that reflect and extent to which sample statistics such as means and ranges can vary due to randomness alone.
d) A and C
Answer c) pg 480

4) Which statement is true regarding risks of using capability index.
a) The process is stable everytime
b) The process output may not be normally distrubuted, in which case inferences about the fraction of output that isn't acceptable will be incorrected.
c) The process is centered and the Cp is used, giving a correct result.
d) A and B
Answer b) pg 485

5) When a C-chart will be used:
a) Observation can be placed into one or two categories. Examples include items that can be classified as good or bad
b) Only the number of occurrences per unit of measure can be counted.
c) The data consists of multiple sampling of n observations each
d) All of the above
Answer b) pg 472