This is the formula used to calculate the Hazard Score for the Healthy Home Rating System (HHRS) using representative scale points to denote likelihood and spread of outcomes judgments. The HHRS is an American adaptation of the British Housing Health and Safety Rating System. The HHRSR was developed to allow assessment of all the main potential housing related health and safety hazards. By focusing on potential hazards, it places the emphasis directly on the risk to health or safety, rather than cosmetic or physical conditions alone. As such, there is significant overlap between the two approaches and the HHRS utilizes the vast housing and health data that forms the basis for the HHSRS in the United Kingdom. The rationale for this borrowing is due to the fact that the United States lacks key data connecting housing and health outcomes. Until such a time as the United States develops a comprehensive data set, the HHSRS provides reliable point-of reference data for our use.