Asahi, T., Turo, D., Shneiderman, B. (January 1995)
The Analytic Hierarchy Process (AHP), a decision-making method based upon division of problem spaces into hierarchies, is visualized through the use of treemaps, which pack large amounts of hierarchical information into small screen spaces. Two direct manipulation tools, presented metaphorically as a "pump" and a "hook," were developed and applied to the treemap to support AHP sensitivity analysis. The problem of construction site selection is considered in this video. Apart from its traditional use for problem/ information space visualization, the treemap also serves as a potent visual tool for "what if" type analysis.