Identification starts with the industry: knowing the usual sources and exposure routes in your sector narrows the search for the hazards your own work creates. A medical centre, for instance, would start from the viruses, bacteria and parasites that reach healthcare workers through person-to-person contact, human biological materials, penetrating injuries, the air and contaminated objects, and would then name its own hazards: bloodborne viruses such as HIV and hepatitis B and C through sharps injuries, gastrointestinal infections such as cryptosporidiosis and giardiasis through faecal contact, and respiratory illnesses such as RSV, whooping cough and influenza through direct contact, contaminated air and touched surfaces. Next come the work activities, asked in turn whether they involve close contact with people or human biological material, close contact with animals or their material, contact with organic material, contact with sharps or anything else that can pierce the skin, or the raising of dust or aerosols; and the work environment, asked whether the work takes place in higher-risk locations, whether the air is good, and whether facilities are adequate and hygienic. The whole workplace is in scope, because the embalmer and the receptionist at a funeral home face different hazards yet both sets must be found. Table 2 supplies the detailed prompts for each heading (shared tools and desks, personal care, the deceased, recent travellers; livestock, pests, wild animals, carcasses; mosquitoes and ticks, floods, water bodies, outbreak zones, laboratories, roof spaces and basements; waste, sewage, dusts, soil, marine matter; needles, pruners, teeth, claws and thorns; dry sweeping, pressure cleaning, milling, non-potable irrigation, disturbing contaminated fabric; damp or enclosed rooms, ventilation and filtration, mould, maintenance of air systems, air sampling; cleaning rosters, linen and laundry temperatures, hand washing, eating areas, waste, food storage, water appliances, drinking water, work clothing, showers, facilities for workers in private homes). Finally, internal records and data show exposures and trends, for example several workers reporting asthma flaring at work: incident and notifiable incident records, compensation claims, feedback from workers and HSRs, inspection and walk-around reports, maintenance reports on air and water systems, results of qualified testing, gaps or absences in systems and procedures, health and safety committee records, and earlier risk assessments.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.