RAS (Reliability, Availability, Serviceability)

ALSO CALLED: Reliability (Systems), RAS, Reliability, Reliability, Availability, Serviceability, Availability
DEFINITION: Reliability, Availability and Serviceability (RAS) is a set of related attributes that must be considered when designing, manufacturing, purchasing or using a computer product or component. The term was first used by IBM to define specifications for their mainframe s and originally applied only to hardware . Today RAS is relevant to software as well and can be applied to network s, application program  … 
Definition continues below.

RAS (RELIABILITY, AVAILABILITY, SERVICEABILITY) DEFINITION (continued): …  s, operating systems ( OS s), personal computers ( PC s), server s and supercomputer s.The term reliability refers to the ability of a computer-related hardware or software component to consistently perform according to its specifications. In theory, a reliable product is totally free of technical errors. In practice, vendors commonly express product reliability as a percentage. The Institute of Electrical and Electronics Engineers ( IEEE ) sponsors an organization devoted to reliability in engineering known as the IEEE Reliability Society (IEEE RS).Availability is the ratio of time a system or … 
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