Survey of Reliability Analysis of Weighted K-out-of-N System

Computer controlled systems used in critical care systems often utilize redundancy to achieve the required level of reliability. However, as highly designed systems become more functionally integrated, they generally consist of several kinds of components with unique purposes. This kind of fault-tolerant system design is especially crucial for vital applications including energy systems, medical devices, and aircraft. With extensive applications in engineering systems both in industry and military, a considerable amount of research has been carried out in the area of redundant systems. The most prevalent kind of redundancy is k-out-of-n type redundancy. In order to develop high reliability systems, redundant models like k out of n systems have been developed. In normal circumstances, each component's contribution to system reliability will differ. When a system has weighted components, each component makes a unique contribution to the system's overall performance. Performance of the system is influenced by both system operation and the sum of the components that make up it. This survey paper provides a general overview of the different types of weighted- k-out-of-n: G systems, methods adapted to their reliability assessment, lifetime distributions and stochastic order of these systems. In order to analyse the various models of weighted k-out-of-n systems, an in-depth investigation is conducted.