Abstract
The main objective of this chapter is to demonstrate the probabilistic reliability engineering approach based on different methods to predict the reliability under stress conditions that mostly occurs during the accelerated test. The highly accelerated life test concept will also be presented. In addition, different reliability growth models will be demonstrated to predict the effect of improvement during design phases to increase the reliability and achieve defined reliability index. Therefore the reliability growth will demonstrate if there is reliability growth, negative reliability effect, as well as no effect after improvement. Such a model can also be applied to repairable equipment to check the environmental conditions and maintenance, and predict the future number of failures. Finally, the chapter will present the probabilistic degradation model that relates the thickness degrade in time caused by corrosion, erosion, and other failure modes with the reliability in time. The chapter will demonstrate all such methods and models based on different examples applied to the oil and gas industry.
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