Applying failure modes, effects, and criticality analysis and human reliability analysis techniques to improve safety design of work process in Singapore Armed Forces
Soon, Weihao K.
Shattuck, Lawrence G.
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The Singapore Armed Forces (SAF) has an instituted safety program that utilizes a generic risk assessment technique called the Risk Assessment Worksheet (RAW), which has several shortcomings. They include vague categorization to guide task decomposition, a generic 5-M factor hazard identification method, and insufficient resolution to prioritize risks. This thesis studies two alternative risk assessment techniques: Process Failure Modes, Effects, and Criticality Analysis (PFMECA) and Human Error Assessment and Reduction Technique (HEART), to determine their suitability for use by SAF. To compare the three techniques in assessing the risks associated with a specific work process, this thesis uses the activity of replacing the track on one side of an armored fighting vehicle in the workshop. Both PFMECA and HEART analyses were more effective than RAW. In addition, PFMECA and HEART were equally effective at identifying the top risks, as shown through side-by-side comparison and a case study. Furthermore, SAF personnel can easily learn and apply the PFMECA technique because SAF is already using a similar technique, the FMECA technique, for technical system analysis.
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