RAMS is an acronym for Reliability, Availability, Maintainability,[1] and Safety,[2] commonly used in engineering to characterize a product or system:

  • Reliability – as ability to perform a specific function and may be given as design reliability or operational reliability.
  • Availability – as ability to keep a functioning state in the given environment.
  • Maintainability – as ability to be timely and easily maintained (including servicing, inspection and check, repair and/or modification).
  • Safety – as ability not to harm people, the environment, or any assets during a whole life cycle.

See also


  1. "Reliability, Availability, and Maintainability - SEBoK". RAMBoK Project. Retrieved 2019-05-26.
  2. System safety, Norwegian University of Science and Technology
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