Finite Element (FE) and other analysis methods are used in conjunction with 3D CAD modelling to provide workable design solutions. Detailed analysis tools include ANSYS, NISA and NASTRAN FE software for structural analysis, SolidWorks CAD software, AutoSEA for vibro-acoustics as well as SHELTR and NISA for system level thermal simulations. Modelling capability includes non-linear materials and geometry, dynamic simulations such as shock, random and harmonic excitation, as well as vibro-acoustic and thermal environmental loads. These techniques are combined with traditional stress analysis methods to provide fully validated structural designs.