Reliability, availability and serviceability
QUALITY OF ROBUSTNESS OF COMPUTER HARDWARE
Reliability, Availability and Serviceability; Reliability, availability and serviceability (computer hardware); Reliability, availability and serviceability (computing); Reliability, availability, and maintainability
Reliability, availability and serviceability (RAS), also known as reliability, availability, and maintainability (RAM), 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..