This paper talks about using an integrated UML and SDL approach and use a design example utilizing Telelogic solutions for Model Driven Development (MDD). Also it shows how existing code-based methods can be introduced and incorporated in your design. The intent here is to not simply talk about modeling, but to show you what will give your designers an edge in building next generation systems. Lastly, we will show how Model Driven Development improves the testing environment allowing for reduced time to market and improved project quality.