olemus
ISO 29481:
nõuded, mis kirjeldavad (äri)tegevuse väljenduses, mida tuleb väljastada või sooritada
= requirements that describes in business terms what needs to be delivered or accomplished

ülevaateid
https://en.wikipedia.org/wiki/Business_requirements
https://requirements.com/Content/What-is/what-are-business-requirements-1
https://www.altexsoft.com/blog/business-requirements-document/
https://thebusinessanalystjobdescription.com/business-requirements/