This example compares the results for test-fix-test data (failure terminated).
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Revision as of 20:19, 9 June 2014
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RGA_Reference_Examples
This example compares the results for test-fix-test data (failure terminated).
Reference Case
International Standard IEC 61164 (Reliability Growth in Product Design and Test – Statistical Test and Estimation Methods), Example 1 – Case 2, pg. 30.
Data
Termination Time = 975 hours
2
4
10
15
18
19
20
25
39
41
43
45
47
66
88
97
104
105
120
196
217
219
257
260
281
283
289
307
329
357
372
374
393
403
466
521
556
571
621
628
642
684
732
735
754
792
803
805
832
836
873
975
Result
Beta (UnB) = 0.5594, Lambda = 1.1067
CL = 0.9 (two-sided confidence bounds on DMTBF
DMTBFUpper = 46.7 hours
DMTBF = 33.5 hours
DMTBFLower = 24.3 hours
CVM = 0.041, critical value = 0.173. Since CVM < critical value can fail to reject hypothesis that the model fits the data.
Results in RGA
Confidence bounds in QCP are calculated using Crow Bounds methodology.
