MGMT 430 - Final Examination Spring 20181.(2)At a Six Sigma quality level, if the process mean is held exactly on target, the expected result would be:a. 1.5 defects per thousand opportunities.b. 2
MGMT 430 - Final Examination Spring 2018
1.(2) At a Six Sigma quality level, if the process mean is held exactly on target, the expected result would be:
1.5 defects per thousand opportunities.
2.8 defects per ten thousand opportunities.
3.4 defects per million opportunities.
2.0 defects per billion opportunities.
2.(2) A bank’s savings account statements contain 24 items of account information. Last month, 2500 bank statements were checked, and 52 errors were found in the account items. What is the dpmo value?
0.021
867
0.46
1154
3.(2) Which of the following is not true regarding control charts?
control charts alone can determine the source of problems
control charts are similar to run charts in that data is plotted versus time
control charts can be used to monitor a process for the existence of special cause variation
the major components of a control chart are the lower control limits, and the center line, and the upper control limits
4. (2) A level of 3.4 defects per million opportunities can be achieved in all of the following ways EXCEPT:
with 0.0-sigma off-centering and 4.0-sigma quality.
with 0.5-sigma off-centering and 5.0-sigma quality.
with 1.0-sigma off-centering and 5.5-sigma quality.
with 1.5-sigma off-centering and 6.0-sigma quality.
5.(2) A _____ is a _____ of the data from the largest frequency to the smallest.
histogram; scatter diagram
pareto diagram; histogram
scatter diagram; break-down chart
check sheet; chronological chart
6.(2) Control limits relate to _____, while specification limits relate to individual measurements.
values within the upper and lower control limits
total values in the range
median values
averages of samples
7.(3) If the sample size in a p-chart changes from 120 to 100, the upper and lower control limits will
move closer together toward the center line
move farther apart away from the center line
remain the same distance from each other
both shift upward with the upper control limit moving further from the center line and the lower control limit moving closer to the center line
8.(3) Five (5) samples of size three (3) were collected for a variable measurement. All sample data were greater than or equal to 4. The sample means, and sample ranges are:
| sample number | |||||
| sample mean | 6.0 | 4.9 | 5.0 | 7.2 | 4.2 |
| sample range | 0.2 | 0.4 | 0.1 | 0.3 | 0.0 |
The sample data are identical in which sample?
a. Sample 1
b. Sample 2
c. Sample 3
d. Sample 4
e. Sample 5
9.(5) Twenty (20) samples of size 50 were taken from a process. The total number of defectives found was 86. The standard deviation for the number of nonconforming items for an np-chart is:
a. 0.0396
b. 1.9825
c. 1.2538
d. 2.0736
e. 3.9302
10.(4) The control limits for a c-chart are:
Upper Control Limit = 5.82
Center Line = 1.8
Lower Control Limit = -2.22, or 0.00
Determine the number of samples used to construct this chart.
a. 2
b. 4
c. 10
d. 16
e. Cannot be determined based on the information presented.
11.(5) Nine (9) circuit boards were inspected to determine the total number of defects per unit. The total number of defects found was 144. The standard deviation for use in designing the control limits for the c-chart is:
a. 3
b. 4
c. 12
d. 36
e. none of the above
12.(4) A machined part has a lower tolerance limit of 4.1 inches and an upper tolerance limit of 4.9 inches. The range for the pre-control green zone is:
4.1 to 4.9 inches.
4.3 inches to 4.7 inches
4.0 inches to 5.0 inches
less than 4.1 inches.
4.5 inches to 4.9 inches.
13.(8) A precision parts manufacturer produces bolts for use in military aircraft. The specifications for bolt length are 37.50 ± 0.25 cm. The company has established an 
-chart and an R-chart using samples of size five. The center lines for the -chart and R-chart are set at 35.25 cm and 1.08 cm, respectively. What is the value of Cp for this process? (Note that all information may not be relevant for the question)
1.333
0.179
0.301
0.156
14.(8) Forty (40) samples of size thirty (30) were collected and a total of 36 nonconforming items were found. The upper control limit (UCL) for a p control chart would be:
a) 0.115
b) 0.111
c) 0.198
d) 0.123
e) None of the above
