Definition
Reliability is the ability of a system, process, device or product to perform its required functions without failure for a specified time under specified conditions.
Human Explanation
It describes how long a solution operates correctly without unplanned disruption.
Why it Matters
Higher Reliability reduces failures, Downtime and maintenance costs and improves process stability.
Conceptual Boundary
Reliability does not mean that failure is impossible. It describes the probability of correct operation under defined conditions.
Practical Perspective
Reliability assessment supports maintenance planning, Risk analysis and the design of more resilient Systems.