In the accompanying research project ARAIG, we were confronted with the problem that although there are different types of encounters between humans and service robots, there is no universal tool for distinguishing between them. Together with the BAuA, we developed the context-person-robot heuristic, KOPROH for short, based on practical experience in R&D projects and the existing scientific corpus. With 16 graphical scales, KOPROH helps to provide clarity about the characteristics of an MRI scenario and to compare multiple MRI scenarios quickly and easily. This paper presents an example of the approach, outlines possible applications, and discusses its utility in occupational science.