How can organizations ensure that they performance appraise their employees fairly and equitably?

Description
The supplementary assessment for this module is as follows: please choose one question.
What is the evidence to support claims that Strategic Human Resource Management (SHRM) aids organizational performance?
How can organizations ensure that they performance appraise their employees fairly and equitably?
What are the benefits of organizations introducing total reward management systems?
Leadership theory has developed significantly over the last few decades, explain the evolution of leadership theory and discuss its relevance to today’s contemporary organizations.