How important is job definition in the Recruitment & Selection practices?

Job definition entails the actial job title or position, duties & tasks, skills, knowledge, experience and qualification; therefore as an important element in Strategic fit Analysis, the Human resource personel must match the elements in a job definition to the actual competencies of the candidate for a particular job inorder to select & recruit the right candidate with the right competencies for the right job

Placing the right people to the right job with knowledge, skills and expereience.