Prepare job summaries, if relevant. You can use the job description template you use for each position that you advertise by filling in the template with the information that is relevant to that position. However, if you do (or expect to do) a lot of hiring of a particular position, you might make a special template that includes a summary of that job. This will save you some time.
A bank of job descriptions can be instrumental in supporting the development of other organizational documents and standards as well. Descriptions may offer a framework for developing performance evaluations. In addition, the information gleaned may provide a common thread for developing employee resumes, policy manuals, annual reports, and organizational media.