Expert Answer:Quality Control Assignment

  

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[Q1] (18 Points)
Listed are 60 readings obtained in a hospital by motion-and-time study analyst who took 6 readings, each day
for 10 days. Prepare a Table showing cell midpoints, cell boundaries, and observed frequencies. Plot a
frequency histogram.
Day
Duration of Operation Time (min)
__________________________________________________________________________________________
1
1.75
2.05
1.83
2.01
1.74
2.20
2
1.90
2.20
1.72
1.93
1.99
1.75
3
1.77
1.83
1.95
1.81
1.88
1.72
4
1.95
1.93
2.03
2.14
1.65
1.70
5
1.90
1.91
2.01
1.77
1.88
2.15
6
1.76
1.88
1.95
1.96
2.00
1.78
7
1.72
1.78
1.96
2.00
2.05
2.10
8
1.90
1.91
1.88
2.01
1.98
1.73
9
1.86
1.88
1.99
2.01
1.77
1.75
10
1.82
1.94
2.01
1.75
1.88
2.01
[Q2] (10 Points)
Using data from [Q1], find the median of the aforementioned problem.
[Q3] (12 Points)
Determine the average and sample standard deviation for the frequency distribution of the number of
inspection per day as follows:
________________________________________________________________________________________
Cell Midpoint
Frequency
________________________________________________________________________________________
1000
07
1300
15
1600
22
1900
18
2200
13
2500
09
[Q4] (15 Points)
A semiconductor company is not willing to use silicon wafer with a boron content of more than 2.35%. Based
on the following histogram, what percent of the silicon is in this category?
__________________________________________________________________________________________
Cell Midpoint (%)
Frequency (Number of Samples)
__________________________________________________________________________________________
1
0.9
5
1.2
16
1.5
12
1.7
11
2.3
18
2.5
16
2.7
4
_________________________________________________________________________________________
[Q5] (10 Points)
Write a short note (not more than 200 words) on SIX SIGMA, relating the concept of SIGMA!
[Q6] (10 Points)
How are the two concepts, “Project Management” and “Six Sigma” related? Could you extend these two
concepts toward providing a better yield management solution?
[Q7] (10 Points)
Paint nonconformities for a one-month period for a riding lawn mower manufacturer are: blister, 212; light
spray, 582; drips, 227; overspray, 109; splatter, 141; bad paint, 126; runs, 434; other 50. Construct a Pareto
Diagram.
[Q8] (8 Points)
Identify a real problem that you faced in doing a project; if not, then create one and then use the fish-bone
diagram approach to mitigate the problem.
[Q9] (7 Points)
What do you mean by Statistical Process Control (SPC)? What do you expect to have its impact in your
future professional life?
2

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