The purpose of this guide is to provide procedures, ideas, and examples that will insure the successful use of job sites to the evaluator who chooses to use job site evaluation to assess client potential outside of the rehabilitation facility. The first part gives some very precise reasons for and examples of the different uses of job site evaluation as well as some of the different types of job sites. A sample job site evaluation planning form is included. The second part of the guide provides step-by-step procedures on how to decide upon and establish a job site evaluation program. A sample checklist for job site development summarizes major points in the process. A third part tells how to evaluate the client on the job site. The wage and hour regulations are described and examples of job site evaluation forms are given in the appendixes. (YLB)