performance

 
The accomplishment of a given task measured against preset known standards of accuracy, 
completeness, cost, and speed. 
In a contract, performance is deemed to be the fulfillment of an obligation, 
in a manner that releases the performer from all liabilities under the contract.
from www.businessdictionary.com
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accomplishment
業績、教養、才能、成就、偉業、成果、達成（感）、完成

obtain rights in a contract
契約上の権利を取得する

deem
考える、思う、見なす

fulfillment
実現、成就、達成

obligation
〔慣習・協定・契約などから生じる〕義務（感）、責任、拘束

liability
法的責任、義務、負担