Positive reinforcement generates more behavior than is minimally required. We call this discretionary effort, and its presence in the workplace is the only way an organization can maximize performance.
The trendy management fads concentrate on antecedents, .. but the only thing that makes what you do (before a behavior) effective is its consistent pairing with a consequence. Antecedents get us going. Consequences keep us going.
The best kind of performance review is no performance review