Test-Fix-Test Data (Failure Terminated) Reference Example: Difference between revisions

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Beta (UnB) = 0.5594, Lambda = 1.1067
Beta(UnB) = 0.5594, Lambda = 1.1067


CL = 0.9 (two-sided confidence bounds on DMTBF
CL = 0.9 (two-sided confidence bounds on DMTBF)


DMTBFUpper = 46.7 hours
DMTBF<sub>Upper</sub> = 46.7 hours


DMTBF = 33.5 hours
DMTBF = 33.5 hours


DMTBFLower = 24.3 hours
DMTBF<sub>Lower</sub> = 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.
CVM = 0.041, critical value = 0.173. Since CVM < critical value can fail to reject hypothesis that the model fits the data.

Revision as of 22:38, 11 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

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
Termination Time = 975 hours


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


IEC 61164 Example 1 - Case 2 Results.png


IEC 61164 Example 1 - Case 2 Stat Tests.png


IEC 61164 Example 1 - Case 2 QPC.png


Confidence bounds in QCP are calculated using Crow Bounds methodology.

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