... Powel. “Designing Real-Time Systems with the Unified Modeling Language.” Supplement to Electronic Design, 9 March 1998, 25. Douglass, Bruce Powel. “UML for Systems Engineering.” Computer Design, ... Varhol, Peter. “Front-End Design Automation for Building Complex Systems. ” Computer Design, July 1998, 87. Varhol, Peter. “New Designs Model Complex Behavior.” Electronic Design, 21 February 2000, ... embedded systems typically involve complex relationships among many inputs and various outputs, statecharts are an important embedded systems design tool for both hardware and software designers....