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Relays Home > Kilovac Home > Typical High Voltage Relays Applications > Predicting Reliability by Weibull Plotting

Predicting Reliability by Weibull Plottings

Kilovac uses Weibull plotting to predict product reliability. Weibull plotting is a simple and efficient way to predict reliability from a small number of life tests and it is widely used for this purpose. At least five and preferably seven or more samples are tested to failure. The cumulative percent failure is plotted against life on Weibull paper. The scales of Weibull paper are designed so the failure data of a wide variety of manufactured devices will tend to lie in a straight line. As the chart above shows, this data can then be interpreted to estimate the likelihood of failure at a given life. If you would like more information on this valuable technique, contact Kilovac and request "Weibull Plotting," Kilovac Engineering Report #219.

KM-13/14/17 Reliability Analysis
Weibull Data Plot of End of Life Failures