5.Is it possible to conduct meaningful performance appraisal without accurate and up-to-date position description and performance indicators?

Fristly the job description is a documents containing the day to day task,the duties and responsibilities of an employee,so related to the question it won't be possible to conduct a meaningful performance appraisal because   if the Manager does not have accurate and up-to-date job description and performance indicators.  The appraisal meeting will be useless because the employer will not know what performance plan has been defined,the employer must know what is the role and responsibilities of the worker,what is his/her task to know if the employee is doing his/her work

In addition the performance indicators will give an idea of how much the effort the worker should give.