An ergonomic survey of the workplace is necessary to aid the employer in reducing cumulative trauma disorders. 2. Ergonomic evaluation incorporates four major scientific areas of study: epidemiological, biomechanical, physiological, and psychophysical. 3. The most frequent types of ergonomic injuries include upper extremity soft tissue disorders and injuries to the back and torso. 4. Basic survey techniques provide knowledge of the workplace and the anatomic and physiologic variations of the worker.