Job specification document is generally prepared with the cooperation of the personnel department and various supervisors throughout the organization. It is the personnel manager who gives the useful information regarding the preparation of job specification.

The supervisor having the knowledge of the job also helps a lot to the personnel manager in giving suggestions while preparing the job specification document. But it mainly depends upon the personnel manager to prepare the job specification document realistic, fair and designed to assist in the organization in attaining its goals.

There are the methods of preparation of Job Specification document