Being aware of both approaches helps find solutions to potential ergonomic problems that may not be solved adequately otherwise. The framework proposes an event cycle. Life's activities can be work or nonwork related. Life's activities can be described through physical requirements and cognitive requirements. Then, modifiers can filter or amplify, prevent or promote, the development of outcomes during life's activities.
Modifiers can be task, personal, or psychosocial.
Personal modifiers include the ways life's activities are performed that are specific to an individual. They may be physiological, medical, or psychological. And personal modifiers can be the result of work style or ergonomics knowledge. Psychosocial modifiers that are cultural, organizational, or social in nature can also exert an effect on outcomes while performing life's activities. The third element of the framework, outcomes, represents the health possibilities that an individual experiences in response to performing life's activities in the presence of modifiers.