Fulfillment of one’s duty. Satisfactory performance is what is expected of a reasonable person.
Merriam-Webster Online Dictionary
performance (noun)1.
a) the execution of an action
b) something accomplished - deed feat
2.
the fulfillment of a claim, promise, or request - implementation
3.
a) the action of representing a character in a play
b) a public presentation or exhibition - a benefit performance
4.
a) the ability to - perform efficiency
b) the manner in which a mechanism - performs engine performance
5.
the manner of reacting to stimuli - behavior
6.
the linguistic behavior of an individual - parole , also the ability to speak a certain language - compare competence 3
Performance (Wikipedia)