산업재해 발생의 상대위험도 분석 및 순환분포 모형 추정

The main purpose of this study is as follows: (1) calculating relative injury and death risks depending on industry, length of service, as well as time of day; and (2) estimating probability density function based on a circular normal distribution, which is known to be the best fit for patterns in incidents by time of day. Despite small absolute number of injuries and deaths, mining industry in Korea remains the most hazardous one from 2002 to 2008 in terms of relative injury and death risk. Meanwhile, construction industry is identified not to have higher risk in injuries in spite of showing a higher figure in death incidents. Employees who have been in extremely long or short length of their service are likely to have higher risk than others. With regard to incidents by time of day, the injury risk early before dawn and in the morning is higher than that in the evening. Meanwhile, the time period with the lower risk is identified to be from 10 a.m. to noon. and 14to 16. A circular model developed on two ‘von Mises’ distributions, circular normal distribution,shows that industrial injuries and deaths are most likely to happen from 9:44 to 10:23 a.m. as well as from 2:59 to 3:44 p.m. on average. The results could be used as useful information for policy making and risk mitigation strategies regarding industrial injuries.