Another common creativity technique is mind mapping, which was developed and documented by Tony Buzan in 1971. Unlike the free-form approach of brainstorming, during the mind-mapping process ideas are laid out as chains of associations in a growing, networked structure. Mind-mapping continues thoughts on the basis of a structural tree, but also enables the inclusion of completely new ideas by creating additional branches. The method of mind-mapping leads the thoughts systematically away from the problem. Ideally, a complete overview of the various aspects associated with the problem is created. However, mind-mapping does not open up an unbiased approach to possible solutions. In addition, in many cases there is no clear tree structure in reality; rather, networking effects are at work that cannot be represented in a mind map. Therefore, some solutions derived from a mind map are not practical at all.