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PMAN 639: PROJECT QUALITY MANAGEMENT
FINAL EXAM
A. Please answer the following True or False questions (each worth 2 points)
1) Special cause variations may fall within the control limits.
True ______ False______
2) A Six Sigma process must have a process capability index of 2.0 or higher.
True _____ False________
3) Control charts are used to determine root causes of the process variation.
True ______ False_____
4) A process in control may produce unacceptable output.
True ______ False______
5) Random variations fall outside the control limits.
True ______ False______
6) Run chart can be used as a measurement tool to track changes in a process
over time.
True _____ False________
7) For a Normally distributed process the control limits are + – 3 times the
standard deviation
True _____ False________
8) Both X bar chart and R chart must be out of control for the process to be out
of control
True _____ False________
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9) If you remove the control limits, a control chart is a trend chart
True _____ False________
10) The correlation between two variables can be determined by a scatter plot.
True _____ False________
B. Please answer the following multiple choice questions (each worth 4 points)):
1) Which of the following is true of common cause variation?
A) It is uncontrollable.
B) It is centered around the mean.
C) It is inherent in the process.
D) All of the above.
E) None of the above
2) An X bar chart is used to monitor _________.
A. Process Dispersion
B. Variation of the baseline
C. Trend in standard deviation
D. Variation of the Mean
3) Which of the following tools are used to organize ideas.
A) Pareto Chart
B) Histogram
C) Affinity Diagram
D) Check sheets
E) Process map
4) Which of the following tools is used to analyze cycle time
A) Control Chart
B) Fishbone diagram
C) Pareto Chart
D) Process map
E) Root Cause Analysis
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5) A true 3 Sigma Process should not have more than _______defects per million
opportunities
A. 6,210
B. 3.4
C. 2700
D. 45500
C. Please respond to the following questions. Each question is worth 10 points:
1) 9
7
create a process map for withdrawing cash from an ATM machine as
1) Please
.
described below:
Janet needed some cash and walks up to an ATM machine. She inserts her debit
card. The machine returns the card and the monitor reads: “could not read the
card try again”. Janet recognizes that she has entered the card in the wrong
direction. She takes the card and turns it around and insert the card again. The
machine keeps the card and the monitor reads: “enter pass code”. Janet enters a
4 digit code. The monitor reads: “ error, try again”.
Janet enters the code again. The monitor displays: Withdrawal? Yes No
Janet selects Yes. Displays shows:
“ $100, $200, $300, $400, $______”.
Janet selects $200. The machine pushes out 10 $20 bills. Monitor then
displays “Receipt? Yes No”. Janet selects No. Monitor displays “Take your
cash” .
The machine returns the card. Display changes to “Thank You”.
Janet takes the cash and her card and walks away.
.
2)
2) A procurement manager has been tracking the delivery performance of her suppliers.
Based on the following data
a) Calculate sigma performance of these suppliers using Z Score tables and rank
order them.
b) Comment on the performance of these suppliers
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Supplier
Number of deliveries
Number of late deliveries
A
25
3
B
C
54
10
70
12
3) A project manager at Global Design Corporation has collected the following data on the
size of software programs and the length of programming time. The company is bidding on
a new system that is estimated to consist of 400,000 lines of code. Use the data to find the
correlation function of coding time to the program size and estimate the number of days it
would take to code the system.
Size in 1000
lines of code
(KLOC)
Module
4
Number of days to
code
1
150
72
2
158
66
3
148
65
4
120
60
5
178
75
6
170
68
7
152
68
8
138
65
9
200
80
10
195
75
11
189
65
12
173
68
13
159
62
14
163
71
15
150
65
16
140
65
17
206
74
18
144
64
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19
157
70
20
183
76
21
195
75
22
190
77
23
185
73
24
152
58
25
178
70
4) A quality control engineer monitors the quality of a cylinder
production line. He regularly selects samples of units and measures
the diameters. The specification requires the diameter to be 6 inches
plus/minus 0.1 inch. If the true mean and standard deviation of the
process are 6.05 and 0.04,
a.
Is the process capable of meeting its specifications?
Calculate its CP and CPk.
b. What % of the cylinders if any are out of specs?
5) A product manager has conducted a customer satisfaction survey of
30 customers on a scale of 1 to 5. The survey data is shown below.
Calculate the mean and standard deviation of the survey and plot a
histogram of the data. Does the distribution approximate Normal?
Customer
1
2
3
4
5
6
7
8
9
10
11
5
Satisfaction rating
4
3
2
5
5
2
1
4
3
4
4
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12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
6)
5
3
3
2
1
5
3
4
3
4
2
4
4
3
3
3
2
2
3
A Black Belt consultant in the ABC Corporation reported the Sigma Performance of a
manufacturing line as 3.5. Using Z score table, calculate the % defective units coming
off the production line.
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