relevance tree

relevance tree. A diagrammatic technique for analyzing systems or processes in which distinct levels of complexity or hierarchy can be identified. A relevance tree for a new drug might start with Biomedical Objectives, under which would be listed Prevention, Diagnosis, Treatment, etc. Under Diagnosis, the tree might branch into Structure, Function, Composition, Behavior, etc. A relevance tree enables an analyst to identify the various aspects of a problem or a proposed solution and thus arrive at a more complete understanding of something. This technique is also useful for identifying unintended side effects of innovations.