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life cycle

Definitions:

  Evolution of a system, product, service, project or other human-made entity from conception through retirement.
Sources:
NIST SP 800-160v1r1 from ISO/IEC/IEEE 15288:2015

  Evolution of a system, product, service, project, or other human-made entity.
Sources:
NIST SP 800-161r1 from ISO/IEC/IEEE 15288:2015 - adapted

  Evolution of a system, product, service, project, or other human-made entity from conception through retirement. 
Sources:
NISTIR 7622 under Life cycle from ISO/IEC 15288