OHST Practice Exam

Which system safety tool is least appropriate for analyzing a complex system?

1. Fault Tree Analysis

2. Multilinear Events Sequencing

3. Job Safety Analysis

4. Failure Modes and Effect Analysis

The correct answer is: Job Safety Analysis

Job Safety Analysis (JSA) is primarily a tool that focuses on the safety of tasks at a micro level, breaking down specific jobs or tasks to identify hazards and implement controls. It is highly effective for direct and routine job evaluations, particularly for identifying risks associated with tasks performed by individuals or small teams. When it comes to complex systems that may involve multiple components, interactions, and potentially overlapping hazards, JSA does not provide the comprehensive analysis required. It tends to be less effective for addressing the broader systemic issues and interdependencies found in complex systems. In contrast, Fault Tree Analysis, Multilinear Events Sequencing, and Failure Modes and Effects Analysis are systematic approaches designed to handle the intricacies of complex systems. These methods involve assessing how different failures can occur, how they interact, and their cumulative effects on system safety. They allow for a more thorough identification and evaluation of risks that are essential in understanding and mitigating potential failures in intricate systems. Thus, JSA's limitations in addressing the complexities of systemic interactions make it the least appropriate tool for analyzing complex systems.