
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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What is the relation between product tolerance and product variation?

Transcribed Image Text:Question 4
1. What is relation between product tolerance (engineering tolerance) and process variation.?
Explain in some details showing some representation.
2. Analyze the following study in terms:
(a) Components of variations and their contributions
(b) X Chart and R Chart
Components of Variation
DATA by PARTS
100
11.14
% Contribution
% Study Var
Tolerance
50-
11.12
11.10
2
3
8
10
Gage R&R
Repeat
Reprod
Part-to-Part
PARTS
R Chart by OPERATOR
DATA by OPERATOR
One
Two
Thưee
UCL-0.01188
11.14 4
0.010-
11.12
0.005
R-0.00462
11.10
0.000
La-0
Theee
Twe
OPERATOR
Xbar Chart by OPERATOR
One
Two
Thưee
OPERATOR * PARTS Interaction
11.14
11.14
OPERATOR
One
- Two
Three
UCL-11.12530
X-11.12057
11.12
11.12
La-11.11585
11.10
11.10-
5 6
PARTS
4
8
9 10
3. Calculate the process capability (show your method). Is it acceptable? Comment on this result.
Process Capability SnapShot
Cpk Chart
X Chart
LSL
USL
140
130
UCL-
-30
30
120
110
x 100
90
80
70
LCL
60
40
60 80
100 120
140
160
Normal Probability Plot (AD -0.286, p=0.624)
Moving Range Chart
40-UCL
30
20
10
75 80 85 90 95 100 105 110 115 120 125 130
Sample Mean
Sample Range
Percent
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