olemus
Wiktionary:
the property of being viable; the ability to live or to succeed

näiteid
ISO/IEC/IEEE 15288:
projekt on elujõuline, kui ta edeneb kehtestatud sihtide ja eesmärkide poole, vastab projekti suunistele, ta kulg vastab projekti elutsükli poliitikatele, protsessidele ja protseduuridele, saaduse järgi püsib vajadus, saadus on mõistlikult teostatav ja investeeringuhüved on vastuvõetavad
= the project is making progress towards achieving established goals and objectives; the project is complying with project directives; the project is being conducted according to project life cycle policies, processes, and procedures; the project remains viable, as indicated by the continuing need for the product; practical product implementation, and acceptable investment benefits

ülevaateid
https://www.lawinsider.com/dictionary/project-viability
https://en.wikipedia.org/wiki/Viability_study
https://en.wikipedia.org/wiki/Minimum_viable_product
http://www.todolistsoft.com/solutions/checklist/project-viability-checklist.php