This presentation shows how The MathWorks products provide an integrated approach for the design of complex systems. Beginning with the concept, the tools provide the ability to develop the system, verify that it satisfies the specifications, allows the designer to optimize the design, and finally, automatically creates the embedded code. Using examples from aircraft and spacecraft design, the unique features of The MathWorks products that allow this process are highlighted. In particular, the open nature of the products and their integration are exploited.