View source for Crow Extended Model for Repairable Systems Analysis Example

<noinclude>{{Banner RGA Examples}}
''This example appears in the [https://help.reliasoft.com/reference/reliability_growth_and_repairable_system_analysis Reliability growth reference]''.
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The failures and fixes of two repairable systems in the field are recorded. Both systems started operating from time 0. System 1 ends at time = 504 and system 2 ends at time = 541. All the BD modes are fixed at the end of the test. A fixed effectiveness factor equal to 0.6 is used. Answer the following questions:

#Estimate the parameters of the Crow Extended model.
#Calculate the projected MTBF after the delayed fixes.
#If no fixes were performed for the future failures, what would be the expected number of failures at time 1,000?

'''Solution'''
<ol>
<li>The next figure shows the estimated Crow Extended parameters.

[[Image:rga13.14.png|center|600px]]

</li>
<li>The next figure shows the projected MTBF at time = 541 (i.e., the age of the oldest system).

[[Image:rga13.15.png|center|450px]]

</li>
<li>The next figure shows the expected number of failures at time = 1,000.

[[Image:rga13.16.png|center|450px]]
</li>
</ol>