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The Advanced Aerodynamics Department at Bombardier Aerospace is developing a multi-disciplinary methodology for the design of commercial transport wings. The approach taken is to build each component of the methodology in a stepwise fashion from the ground up and integrate the engineering analysis and design tools already in place at Bombardier. Development efforts have been directed to the integration of low and high fidelity computational fluid dynamics codes into the multi-disciplinary environment, the development of conceptual wing structural design codes, wing weight estimation codes, and codes for the prediction of wing static aeroelastic deformation under load. This paper gives an overview of the development and validation of the various components of the methodology and their integration into an engineering approach to multi-disciplinary optimization.