Remaining Useful Lifetime (RUL): Probabilistic Predictive Model

Reliability evaluations and assurances cannot be delayed until the device (system) is fabricated put into operation. of an electronic product should conceived at early stages its design; implemented during manufacturing; evaluated (considering customer requirements existing specifications), by electrical, optical mechanical measurements testing; checked (screened) fabrication; and, if necessary appropriate, maintained in field product’s Prognostics health monitoring (PHM) effort can significant help, especially last, operational stage, use. Accordingly, a simple physically meaningful probabilistic predictive model suggested for evaluation remaining useful lifetime (RUL) after appreciable deviation from normal operation conditions has been detected, corresponding increase failure rate change configuration wear-out portion bathtub curve assessed. The general concepts are illustrated numerical example. employed, along with other PHM forecasting interfering tools means, to evaluate maintain high level reliability (probability non-failure) stage lifetime.