What is the value of tying an appraisal to existing standards and performance objectives?

What is the value of tying an appraisal to existing standards and performance objectives? What advantages and protections does it offer?

Managing Human Resources by Snell and Bohlander: file:///C:/Users/martrodriguez/Downloads/Managing%20Human%20Resources%20-%20PDF%20Room.pdf
Chapter 7
Chapter 8

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