抄録
We propose to introduce a UML modeling and an object-oriented approach to risk assessment of human-robot cooperating systems. Risk assessment is based on the international safety standard ISO 14121, and our UML-based, hierarchical unified model includes its elements of machinery, human, environments, origin and consequences of hazards and their types of group. By using the model, different view points of safety factors such as an exhaustive list of hazards, scenario of tasks or potential hazardous situations can be derived from a unique dataset. Also, an iterative process of risk assessment and system modification are executed easily. We describe our model and some examples.
