LEON STARR has been developing real-time and embedded software with executable models since 1985. His models have been used in factory material transport control systems, ultrasound diagnostic and cardiac pacing systems, gas chromatography and semiconductor wafer inspection systems, video post-production systems, and networked military battle simulators. The author of How to Build Shlaer-Mellor Object Models and Executable UML: A Case Study, he is a founding member and senior consultant at Model Integration, LLC in San Francisco, CA.