Operation
Part of speech: noun
Definition: The method by which a device performs its function. The method or practice by which actions are done. A planned undertaking. A business or organization. a surgical procedure. a procedure for generating a value from one or more other values (the operands; the value for any particular operands is unique) a military campaign (w:Operation Desert Storm)
Example sentence: We are now after 7 months operation making money here.
Performance
Part of speech: noun
Definition: The act of performing; carrying into execution or action; execution; achievement; accomplishment; representation by action; as, the performance of an undertaking of a duty.That which is performed or accomplished; a thing done or carried through; an achievement; a deed; an act; a feat; especially, an action of an elaborate or public character.A live show or concert.In Computer science: The amount of useful work accomplished by a computer system compared to the time and resources used. Better Performance means more work accomplished in shorter time and/or using less resources
Example sentence: Consistency of performance is essential. You don't have to be exceptional every week but as a minimum you need to be at a level that even on a bad day you get points on the board.