As noted, there are two aspects of performance pay for executives within the overall rubric of the public service. It's probably worth having a conversation with the office of the chief human resources officer and the folks at the Treasury Board who set the overall framework.
However, as I noted, the vast majority of performance pay for executives is actually withheld pay for basic performance, and that is allocated on the basis of meeting your overall basic assumptions of work. Then there are a very select number of individuals who receive bonuses on the basis of very exceptional performance indicators and an exceptional performance in a given year.