Reliability, Availability and Maintainability (RAM)
A RAM analysis (Reliability, Availability and Maintainability) is used to estimate the availability of a system. There are several methods and tools that can be applied for RAM analyses; each method has its strengths and weaknesses.
When considering a production or process plant which may have several output levels the RAM analysis is often denoted Production Availability Analysis or Production Performance Analysis. The latter term is used in ISO20815.