What is the difference between valid and reliable?

What is availability and reliability?
- Reliability, availability and serviceability (RAS) is a computer hardware engineering term involving reliability engineering, high availability, and serviceability design. The phrase was originally used by International Business Machines (IBM) as a term to describe the robustness of their mainframe computers.
What is the definition of reliability and validity?
- Reliability is more on the consistency of a measurement, while validity is focused more on how strong the outcome of the program was. 2. Reliability is easier to determine, because validity has more analysis just to know how valid a thing is.
What is the reliability of a system?
- 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.


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