Reliability can distinguish products. Reliability means the product, service or system will perform as expected now and in the future.
Statisticians provide the language to discuss product reliability.
Beyond the fundamental set of statistical tools, reliability has a set of specialized statistical techniques. The reliability goal comes from technical capabilities and market expectations. Also, for complex systems, determine the reliability goal for each module or subsystem. Given the reliability goal and other constraints, the development team attempts to meet the reliability goal at the lowest cost. Analysis includes reliability predictions, often using part count methods or reliability block diagramming.