Incidence rate is the ratio of the new cases of diseases or injury occurring in a population in a given period to the total population. It is generally expressed over a population of 1000 or 10000 per annum. It can be used to indicate the relative level of incidences of a disease or injury occurring in a given company or department or industry. This rate can help identify the problem area as well as a solution for it. The Bureau of Labour Statistics has devised a step-wise procedure that allows one to gauge an organization’s illness or injury record.