This factor measures the context in which the job is performed by considering four dimensions:
• Physical Effort – Levels of physical activity that vary in intensity, duration and frequency that contribute to physical stress and fatigue.
• Physical Environment – Progressive degrees of exposure of varying intensities to unavoidable physical and environmental factors which increase the risk of accident, ill health or discomfort. • Sensory Attention – Levels of sensory attention (e.g., seeing, hearing, smelling, tasting, touching) during the work process that vary in intensity, frequency and duration.
• Mental Stress – Progressive degrees of exposure of varying intensities of factors inherent in the work process which increase the risk of such things as tension or anxiety.