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Fundamentals of Operations Management, 4/e

Mark M. Davis, Bentley College
Nicholas J. Aquilano, University of Arizona
Richard B. Chase, USC, School of Business

Quality Management (6S. Quality Control Tools for Improving Process)

Multiple Choice Quiz


1	Acceptance sampling and statistical process control are essentially the same thing.
		A)	True
		B)	False


2	Type II error occurs when a sample says parts are bad or that the process is out of control when the opposite is true.
		A)	True
		B)	False


3	Taguchi would support the use of upper and lower specifications to describe quality costs rather than a specific target value.
		A)	True
		B)	False


4	With Six Sigma the goal is to reduce process variation to 10% of the design tolerance.
		A)	True
		B)	False


5	Which of the following shows each of the steps that are required to produce a good or service?
		A)	Process flow chart
		B)	Histogram
		C)	Pareto chart
		D)	Cause-and-effect diagram


6	Which of the following quality tools establishes priorities for action?
		A)	Process flow chart
		B)	Histogram
		C)	Pareto chart
		D)	Cause-and-effect diagram


7	Which of the following would be considered a variable quality characteristic?
		A)	The number of hours in the life time of a 100-watt light bulb
		B)	The number of burnt potato chips in a bag of potato chips
		C)	The number of streaks in each window after a cleaning service
		D)	The number of pens that don't write out of one hundred pens


8	A process when in control produces a normally distributed output with a mean of 200 and a mean range of 20. What percentage of the sample means will be above 200?
		A)	68
		B)	50
		C)	5
		D)	1
		E)	.27


9	The X-bar chart is most appropriately used to control which of the following?
		A)	The standard deviations of diameters of a turned part.
		B)	The mean diameter of a turned part.
		C)	The process response.
		D)	The percentage of customers satisfied with service received
		E)	The process probability


10	The P chart is most appropriately used to control which of the following?
		A)	The standard deviations of diameters of a turned part
		B)	The mean diameter of a turned part
		C)	The process response
		D)	The percentage of customers satisfied with service received
		E)	The process probability


11	The R chart is used to control which of the following?
		A)	The standard deviations of diameters of a turned part
		B)	The mean diameter of a turned part
		C)	The process response
		D)	The percentage of customers satisfied with service received
		E)	The process probability


12	What is the probability that when a process is in control it will be accepted as in control when a two tail Z of 3.00 is used to accept or reject the process?
		A)	.9973
		B)	.9900
		C)	.9800
		D)	.9600
		E)	.9200

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