Which groups of people is the observation method suitable for quality of life assessment?

Porter, operator, secretary, etc. Observation method is suitable for manual workers and transactional workers, such as porters, operators and secretaries. Different observation objects have different work cycles and work suddenness, which is suitable for a large number of standardized and short-term jobs with physical activities as the main part. Quality of life means that people are in a perfect state in physical, mental and social life, not just not sick and weak.