mission function

** A category of organizational work comprising the substantive, purpose-driven activities that an entity exists to perform — its operational outputs and end-user-facing tasks — as distinguished from the administrative and technical functions that sustain or enable those activities (support functions). In NIST's access-control framework, the concept appears in the separation-of-duties control (AC-5), which calls for "dividing mission functions and information system support functions among different individuals and/or roles," alongside examples such as system management, programming, configuration management, and network security as the contrasting support side. The distinction is used to address "the potential for abuse of authorized privileges and reduces the risk of malevolent activity without collusion" by ensuring that those who perform an organization's primary work cannot also control the oversight, access, or audit mechanisms that govern it. **VERDICT:** TERM_OF_ART --- **Sources cited:** - NIST SP 800-53 Rev. 4, Control AC-5 (Separation of Duties), via CSF Tools: https://csf.tools/reference/nist-sp-800-53/r4/ac/ac-5/ - NIST SP 800-53 Rev. 5 (draft markup), AC-5: https:

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