► Reliability engineering is a sub-discipline of systems engineering that emphasises dependability in the lifecycle management of a product. Dependability, or reliability, describes the ability of a system or component to function under stated conditions for a specified period of time. Reliability is closely related to availability, which is typically described as the ability of a component or system to function at a specified moment or interval of time.✦► Reliability is theoretically defined as the probability of success Probability of Failures the frequency of failures; or in terms of availability, as a probability derived from reliability, testability and maintainability. Testability, maintainability and maintenance are often defined as a part of "reliability engineering" in Reliability Programs. Reliability plays a key role in the cost-effectiveness of systems.✦ 【Topics Covered in this App are Listed Below】⇢ Basic Terms of Reliability⇢ probability basics⇢ Characteristics of Reliability⇢ Bathtub Curve⇢ Reliability of Systems⇢ Time to Failure of Deteriorating Objects⇢ maintenance⇢ diagnostics⇢ Failure Analysis⇢ Approaches to Ensuring the Reliability and Safety