What makes a performance review successful?

Its linkage to other processes
Manager/Supervisor’s commitment to the process
Manager/Supervisor’s awareness of all pieces that need to be in place
Manager/Supervisor’s objectivity
Manager/Supervisor’s training
Manager/Supervisor’s and staff’s preparation for the assessment
Accountability for ensuring it happens and happens effectively
Consistency of scope and of language
Timing and timeliness of the assessment
Pre-determined schedule