Concept maps may be sketched on paper or on a computer. It is important to recognize that there is no correct answer for a concept map - their purpose is to assist the researcher to develop their understanding. Loosely structured maps appeal to some researchers, whilst others prefer more structured approaches based on principles such as flowcharts, or hierarchies. Since concept maps are based on the researcher’s understanding at the point in time when they were drafted it is likely that as the research advances they will change, with concepts being merged, or new concepts and relationships being added.