What are reliability, availability, and maintainability in engineering?

Reliability, Availability, and Maintainability (RAM) are key performance metrics used in engineering to assess the performance and efficiency of systems. Reliability measures the probability that a system will perform its intended function without failure for a specified period. Availability refers to the proportion of time a system is operational and ready for use, while maintainability is the ease and speed with which a system can be restored to working condition after a failure. Together, RAM analysis helps organizations optimize system design, reduce downtime, and manage maintenance costs.