Management system failures. Refer to the Process Safety Progress (December 2004) and U.S. Chemical Safety and Hazard Investigation Board study of industrial accidents caused by management system failures, Exercise 2.150 (p. 142). The table below gives a breakdown of the root causes of a sample of 83 incidents. Are there significant differences in the percentage of incidents in the four cause categories? Test using Â = .05.
Management system failures. The U.S. Chemical Safety and Hazard Investigation Board (CSB) is responsible for determining the root cause of industrial accidents (Process Safety Progress, December 2004). The accompanying table gives a breakdown of the root causes of 83 incidents caused by management system failures.
a. Find the relative frequency of the number of incidents for each cause category.
b. Construct a Pareto diagram for the data.
c. From the Pareto diagram, identify the cause categories with the highest (and lowest) relative frequency of incidents.