olemus
ressursi, tulemi või protsessi puudulikkus või puudujääk

Wiktionary:
1. an instance of not meeting a quota, debt, or monthly payment on a debt or other obligation, or of having an insufficient amount to cover such obligations
Due to a shortfall in revenue, we will have to make some cuts.
2. the amount by which a quota, debt, or monthly payment on a debt or other obligation is missed; the difference between the actual quota or debt and the lesser amount available to pay such obligations

näiteid
https://en.wikipedia.org/wiki/Expected_shortfall
https://en.wikipedia.org/wiki/Benefit_shortfall
https://en.wikipedia.org/wiki/Implementation_shortfall