逐次確率比検定法による労働災害発生率の統計評価に関する研究

抄録

Testing hypotheses for the accident frequency rates in construction works were applied to discover the significant changes in the accident situation in succeeding intervals of time. The time intervals between occupational accidents were employed as a useful indicator to measure the safety performance in construction sites. In order to save the sample number of accidents as well as the time periods to reach a statistical decision, sequential probability ratio tests were utilized for testing hypotheses of accident frequency rates. By making use of the sequential tests for various types of accidents, some features of accident situation were identified. Diagrams illustrating a sequential testing procedure could also be used as a control chart in safety management.