Whats human factors and whats physical factors?
HUMAN FACTORS: Human Factors is a discipline of study that deals with human-machine interface. Human Factors deals with the psychological, social, physical, biological and safety characteristics of a user and the system the user is in. It is sometimes used synonymously with ergonomics, but ergonomics is actually a subset of Human Factors. PHYSICAL FACTORS: Non-living factors that affect organisms and their survival.