The document describes the Occupational Performance Model (OPM). It was first conceptualized in 1986 by Dr. Christine Chapparo and Dr. Judy Ranka at the University of Sydney, Australia. The OPM views occupational performance as the ability to carry out occupations or activities to fulfill roles. It is influenced by occupational performance components, contexts, and roles. Contexts include temporal factors like development stage and environmental contexts such as physical, social, and cultural environments. Roles are patterns of occupations that fulfill self-maintenance, productivity, and self-enhancement.