Causal Analysis of Over 3-Day Injury at Work Using Fault Tree Analysis: A Case Study of 17 Manufacturers in Samut Prakarn Province

Abstract

This study was a retrospective study to analyze root causes of over 3-day injuries at work of 96 employees from 17 manufacturers in Samut Prakarn province. The accidents were analyzed using the fault tree analysis technique to fnd solutions to control and prevent them. Descriptive statistics were used to explain frequency and percentage of root causes of over 3-day injuries at work. The results of study showed that most of over 3-day injuries resulted from accidents occurring in production lines with an average of 16.8 working days off. Most accidents were caused by a combination of root causes: sub-standard act, sub-standard condition, job factor and personal factor. About 59.4% of all accidents resulted from the combination of  sub-standard act, sub-standard condition and job factor, whereas 13.5% of them resulted from the combination of sub-standard act and job factor. Most of the sub-standard acts were working with carelessness and not following job instructions, whereas damaged machine, equipment and tool, and no safeguard were the highest percentage of sub-standard conditions. In addition, a lack of safety training (job factor) and lack of working skills (personal factor) were also important root causes of accidents. Therefore, sub-standard act, sub-standard condition, job and personal factors should be taken into account in control and preventive measures of over 3-day injury at work.