olemus
ISO/IEC/IEEE 24765 jt:
elutsüklisse puutuvate protsesside ja tegevuste karkass,
mis on korraldatav järkudeks ning
on ka üldine suhtluse ja mõistmise etalon
=
framework of processes and activities concerned with the life cycle that can be organized into stages, which also acts as a common reference for communication and understanding

näiteid
https://www.sebokwiki.org/wiki/Generic_Life_Cycle_Model

https://www.sebokwiki.org/wiki/Life_Cycle_Models

https://www.sebokwiki.org/wiki/System_Life_Cycle_Process_Models:_Vee

https://www.sto.nato.int/publications/STO%20Educational%20Notes/STO-EN-SCI-276/EN-SCI-276-04.pdf

https://www.paldesk.com/software-development-life-cycle-sdlc-definition-models-and-phases/

https://ase.in.tum.de/lehrstuhl_1/files/teaching/ws0607/Software%20Engineering%20I/L17_SoftwareLifecycleModels.pdf