Line 180:
Line 180: *BD Mode Parameters: Beta = 0.7472, Lambda = 0.1820
*BD Mode Parameters: Beta = 0.7472, Lambda = 0.1820
*PMBTF = 11.29 hours
*PMTBF = 11.29 hours
Line 192:
Line 192: *The growth potential MTBF plot:
*The PMTBF is 11.29 hours as shown in the plot:
[[image:MIL-HDBK-189A 7.5.2 Example_Plot.png|center|550px]]
[[image:MIL-HDBK-189A 7.5.2 Example_Plot.png|center|550px]]
Revision as of 20:23, 16 June 2014
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Test-Fix-Find-Test Data Reference Example
This example compares the results for test-fix-find-test data.
Reference Case
MIL-HDBK-189A, Section 7.5.2, pg. 206, 2009.
Data
The following table shows the data.
Failure Time
Classification Mode
0.7
BC1
3.7
BC1
13.2
BC1
15
BD1
17.6
BC2
25.3
BD2
47.5
BD3
54
BD4
54.5
BC3
56.4
BD5
63.6
A
72.2
BD5
99.2
BC4
99.6
BD6
100.3
BD7
102.5
A
112
BD8
112.2
BC5
120.9
BD2
121.9
BC6
125.5
BD9
133.4
BD10
151
BC7
163
BC8
164.7
BD9
174.5
BC9
177.4
BD10
191.6
BC10
192.7
BD11
213
A
244.8
A
249
BD12
250.8
A
260.1
BD1
263.5
BD8
271.1
A
274.7
BD6
282.8
BC11
285
BD13
304
BD9
315.4
BD4
317.1
A
320.6
A
324.5
BD12
324.9
BD10
342
BD5
350.2
BD3
355.2
BC12
364.6
BD10
364.9
A
366.3
BD2
373
BD8
379.4
BD14
389
BD15
394.9
A
395.2
BD16
Termination Time = 400 hours
BD Mode
EF
1
0.67
2
0.72
3
0.77
4
0.77
5
0.77
6
0.87
7
0.92
8
0.50
9
0.85
10
0.89
11
0.70
12
0.63
13
0.64
14
0.72
15
0.69
16
0.46
Result
The book has the following results:
Beta = 0.9103, Lambda = 0.2397 BD Mode Parameters: Beta = 0.7472, Lambda = 0.1820 Results in RGA
In RGA, the Crow Extended model with the maximum likelihood estimation (MLE) method was used to calculate the results.
The model parameters are:
The PMTBF is 11.29 hours as shown in the plot:
