he quality of their performance of assigned duties, particularly when incompetence, dereliction, or malfeasance is at issue. See also: performance evaluation. 
[Computer and Information Sciences] 
n., The obligation to answer or answer for discharge of duties or conduct. [General Dictionaries] 
n., Principle that individuals, organizations, and the community are responsible for their actions and may be required to expl
ain them to others. [General Dictionaries] 
n., The conscious exercise of will by a perso