Toerekenbaarheid means accountability or responsibility. Tekortschieten means to fall short of what is expected of you. The context is some kind of employment evaluation where someone is being reprimanded for falling far short of expectations in fulfilling a role for which they are responsible. Culpable means the person is blameworthy for being deficient in these areas. I think these two words express what is meant. The term is used in a legal sense as well. also as non-culpable deficiency. See examples below. Google search will bring up many more examples but I have taken these two in the field of employment legislation which applies here.

Nothing wrong with "culpable deficiency" (although some legal eagles might find "culpable" a bit strong) or "to fail imputably"; however, "attributable / imputable shortcoming" is also used:

http://www.iflr.com/?Page=10&PUBID=33&ISS=12029&SID=512263&T...

“Most of the disputes revolved around two issues: misleading advertising and attributable shortcoming in the exercise of proper care.”

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http://www.gxwebmanager.com/web/file?uuid=a0b1a186-de4b-4ce2...

“Exceeding a given (delivery) date which may be applicable never constitutes an attributable shortcoming by GX. GX does not accept liability under any circumstances in cases where the (delivery) date may be exceeded.”

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http://www.tennet.org/images/TT alg.ink.voorw051214_NL_ENG_M...
“..as a result of an imputable shortcoming in the fulfilment of the Agreement..”
Translation:
“..als gevolg van een toerekenbare tekortkoming in de nakoming van de Overeenkomst..”

See Jurlex

Repudiation - one side, whether in an emplyoment contract or not, behaves in such a way as to make the other side think the contract is at an end. That side may then accept the beach and carry on with the contract or reject it and not.

De Principles of European Contract Law (en ook de Principles of
International Commercial Contracts) formuleren het zo. Zie bv. art. 1:301, punt 4: "‘non-performance’ denotes any failure to perform an obligation under the contract, whether or not excused, and includes
delayed performance, defective performance and failure to co-operate in order to give full effect to the contract" + het commentaar erbij in de teksteditie (ben te lui om dat nu allemaal over te tikken). Zelfde concept als tekortkoming in Nederland dus. Volgens mij een handige oplossing als je het niet in common law-termen wilt omschrijven (i.e. breach of contract). Meer in het hoofdstuk in de PECL over de rechtsmiddelen, art. 8:101, 8:108 e.v.

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