Multiple Systems (Known Operating Times) Data Reference Example: Difference between revisions

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Beta = 0.716, Lambda – 0.454
 
DMTBF = 15.5 hours
 
Using significance level = 0.05. CVM = 0.091. Critical value = 0.218. Since CVM < critical value can fail to reject hypothesis that model fits the data.
 


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Sample content
Sample content

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Multiple Systems (Known Operating Times) Data Reference Example

This example compares the results for multiple systems (known operating times) data.


Reference Case

MIL-HDBK-189A, Section 6.3.1.6.4, pg. 156, 2009.


Data

Termination Time = 300 hours
  • = system failed
Prototype #1 Prototype #2 Cumulative Time
*2.6 0 2.6
*16.5 0 16.5
*16.5 0 16.5
*17 0 17
20.5 *0.9 21.4
25.3 *3.8 29.1
28.7 *4.6 33.3
*41.8 14.7 56.5
*45.5 17.6 63.1
48.6 *22 70.6
49.6 *23.4 73
*51.4 26.3 77.7
*58.2 35.7 93.9
59 *36.5 95.5
60.5 *37.6 98.1
*61.9 39.1 101.1
*76.6 55.4 132
81.1 *61.1 142.2
*84.1 63.6 147.7
*84.7 64.3 149
*94.6 72.6 167.2
104.8 *85.9 190.7
105.9 *87.1 193
*108.8 89.9 198.7
132.4 *119.5 251.9
132.4 *150.1 282.5
132.4 *153.7 286.1


Result

Beta = 0.716, Lambda – 0.454

DMTBF = 15.5 hours

Using significance level = 0.05. CVM = 0.091. Critical value = 0.218. Since CVM < critical value can fail to reject hypothesis that model fits the data.


Results in Weibull++

Sample content

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