Mission-essential Function
A mission critical (also mission essential) factor of a system is any factor (component, equipment, personnel, process, procedure, software, etc.) that is essential to business, organizational, or governmental operations. Failure or disruption of mission critical factors would have a serious impact on business, organization, or government operations, and can even cause social turmoil and catastrophes. Mission critical systems A mission critical system is a system that is essential to the survival of a business or organization. When a mission critical system fails or is interrupted, business operations are significantly impacted. Mission essential equipment and mission critical application are also known as mission critical system. Examples of mission critical systems are: an online banking system, railway/aircraft operating and control systems, electric power systems, and many other computer systems that will adversely affect business and society when they fail. A good exampl ...
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System
A system is a group of interacting or interrelated elements that act according to a set of rules to form a unified whole. A system, surrounded and influenced by its open system (systems theory), environment, is described by its boundaries, structure and purpose and is expressed in its functioning. Systems are the subjects of study of systems theory and other systems sciences. Systems have several common properties and characteristics, including structure, function(s), behavior and interconnectivity. Etymology The term ''system'' comes from the Latin word ''systēma'', in turn from Greek language, Greek ''systēma'': "whole concept made of several parts or members, system", literary "composition"."σύστημα"
, Henry George Liddell, Robert Scott, ''A Greek–English Lexicon'', on Pers ...
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