a tool for determining what is done on a given job and what should be done on that job
first it tells HR manager about the job itself: the essential tasks, duties, and responsibilities involved in performing the job
describes the skills, knowledge, abilities, and other characteristics needed to perform the job
what it does
provide HR information, assit with HR programs (recruitment, training, selection, appraisals, and reward systems. Helps increase value added by employees, defends against lawsuits, clarifies what is really required for job.