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Many aerospace & defense organizations have placed an increased emphasis on reducing the time to transition products from engineering to manufacturing while simultaneously reducing the product technical risks. One area with the greatest impact on these objectives is detailed design. This is the stage in the product development lifecycle when the development team addresses the detailed product definition and “Design for Six Sigma”. Unfortunately, most aerospace & defense manufacturers still follow a serial process for creating the detailed design. In addition, producibility is often not formally addressed because it is treated as an additional step that requires extra engineering effort that delays completion of the product definition. This paper presents a solution piloted at Aerojet for the detailed design and manufacture of missile propulsion systems.