SOLUTIONS-4 unified design representation can work. This has always been considered impractical due to major problems of run time, space, tool interdependencies, and multiple representations. We have addressed these problems and found them tractable. We present our solutions to these problems, gained through the experience of developing the Droid design system.We answer each of these probelms as follows.Run T&g: Much of the speed gained with custom databases is squandered on intertool communication, and the cost of recreating data and relationships lost in translation. We have found the speed of the entire design system is improved by the use of a unified representation.
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