evaluation criteria should be job-related
evaluations must be frank and objective - do not be afraid to let workers know about their faults just because they happen to belong to some minority group - courts have held it to be discriminatory to fail to let minority workers know when they have shortcomings
design the form to where it is detailed enough to give the needed feedback to the employee, but not so complicated that managers will be reluctant to use it properly
give at regular intervals
use measures that are as quantifiable as possible
discuss the evaluation with employee; have the employee sign it
provide a space for the employee's response/self-evaluation
inform the employee that signing the form does not necessarily mean agreement, but rather only receipt and a chance to review