Meaning of Reliability and Maintainability
Reliability Reliability may be defined as the probability, or degree of confidence that a product will perform a specified number of times under prescribed conditions. For example, the reliability of an electrical changeover switch may be defined as 0.9999. This may hold true only when it is operated with an input voltage of 440 volts AC, in an environmental temperature range of 0 to 80 degrees C, with humidity less than 90 percent, if its housing has never been opened, if it has been operated less than 1 million times, and if its is less than five years old. Even if any one of these conditions is violated, then the reliability concepts goes off. When parts are interdependent, and especially when there is a large number of them, achieving a high degree of reliability for a product presents and real challenge. Maintainability Maintainability refers to the ability of the user Continue reading