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The Tangible IP Network Designer and the Tangible Business Process Analyzer operate on the Sensetable platform, which lets users interact physically with computer network simulations to take the guesswork out of “what if” scenarios, and visualize changes. Sensetable lets the user explore how one—or several—changes will affect a complex system by projecting graphic representations of those changes directly onto a tabletop surface. Small, wireless tokens are tracked electromagnetically as the user moves them across the projected image on the table. When a token comes close to an “information point,” it becomes “bound” to that point, as though plugged into a socket, and can be used to change the information represented. The system then displays the “ripple effect” of that change across the entire representation. And because the table is not tied to any particular software, it can be used for a variety of applications—in a “much more engaging way than looking at spreadsheets or PowerPoint slides,” says Media Lab Professor Ishii. NTT Comware’s Tangible IP Network Designer lets users explore how changing variables such as link rate, cost, or client-response time factor into a network’s efficiency and profitability. NTT Comware’s Ichiro Kase says it should be perfect for helping both senior executives and customers explore complex options: “It allows those who are not involved in the daily task of engineering modeling to immediately grasp the tradeoffs involved in system changes.” Their second system, Tangible Business Process Analyzer, is a collaborative tool for business process re-engineering, allowing multiple users to directly model workflow and control parameters (such as the size of the work force) using physical tokens. Users can examine hypotheses, discover problems, and visualize the effects of a solution. Both systems were commercialized in 2004.