Читать книгу System Reliability Theory - Marvin Rausand - Страница 48

By the systems approach, all our information about the operational loads and the strength of an item is incorporated in its probability distribution function of the time‐to‐failure . No explicit modeling of the loads and the strength is carried out. Reliability metrics, such as the survivor probability and the mean time‐to‐failure are deduced directly from the probability distribution function . Various approaches can be used to model the reliability of systems of several components and to include maintenance and replacement of components. When several components are combined into a system, the analysis is called a system reliability analysis.

Quantitative results are based on information about the reliability of the components. Such information comes from statistical data on past experience with the same or similar components, laboratory testing, or from expert judgments. This approach has similarities to actuarial assessments, and the systems approach to reliability is, therefore, sometimes referred to as an actuarial approach. This book is concerned with the systems approach to reliability.