Additional Resources > Windchill Risk and Reliability Practitioner’s Guide > Reliability Prediction Methods > Reliability Prediction for Items Prone to Wear-Out > Example of Application of Model
Example of Application of Model
An example of the use of the failure rate model and the data tables follow.
Example Edge Connector
Task
An edge connector using 85 active pins is being used in an air protected (A1) environment. It is estimated that it will be disconnected and reconnected 25 times per 1000 operating hours. Predict the operational failure rate of the connector.
Solution
1. From equation 3.5, the failure rate model for connectors is:
2. The appropriate values of λB, KE, λP and λcyc are:
▪ From Table A-1, λB=0.03.
▪ From Table A-1, KE=2.0 (Air protected, Al).
▪ From Table A-37, KP=19.39.
(85 active pins, NP)
▪ From Table A-36, λcyc=0.00125.
3. Calculate λp by inserting the values derived above into the model in Step 1: