Introduction to Quality and Reliability Engineering by Renyan Jiang

Author:Renyan Jiang
Language: eng
Format: epub
Publisher: Springer Berlin Heidelberg, Berlin, Heidelberg

9.5.3 Life Testing Method

Life testing methods are used to determine reliability by testing a relatively large sample of units operating under normal or higher stresses. The data can be fitted to an appropriate life distribution using statistical methods discussed in Chap. 5, and reliability metrics can be estimated from the fitted life distribution model.

The prediction results obtained from the life testing method are usually more accurate than those from the empirical method since the prediction is based on failure data from particular products.

The life testing method is product-specific. It is particularly suited to obtain realistic predictions at the system level because the prediction results at the system level obtained from the empirical and physics of failure methods may be inaccurate due to the fact that the assumptions can be unrealistic. However, the life testing method can be costly and time-consumed.

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