1. The fixity of building products, the fluidity of production and many external environmental factors determine the complexity of occupational health and safety and environmental management.
2. The diversity of products and the singleness of production determine the variability of occupational health and safety and environmental management.
3. The continuity and division of labor in the production process determine the coordination between occupational health and safety and environmental management.
4. The entrustment of products determines the non-conformity between occupational health and safety and environmental management.
5. Each stage of product production determines the sustainability of occupational health and safety and environmental management.
6. The times and sociality of products determine the economy of occupational health and safety and environmental management.