1) Having a job description that details physical functions and demands, rather than just responsibilities, can benefit employers and employees by identifying injury prevention measures like conditioning, training, and ergonomics. 2) A job function description accurately describes jobs to applicants, forms the basis for job-related tests, assesses reasonable accommodations, and identifies ergonomic opportunities. 3) Developing accurate job function descriptions can help physicians with return-to-work planning and prevent costly workers' compensation claims, resulting in cost savings for employers.