Today, Computer Aided Engineering (CAE) has become an essential part in the development of Thermal-Acoustical Protective Shields (TAPS). As presented three years ago, such a theoretical approach has been able to reduce the development cycle of TAPS while simultaneously reducing costs. Using the approach as previously presented gave us an opportunity to learn more and upgrade the approach with more modules. These modules are focused not only on obtaining better accuracy but also adding information about processes and function of the TAPS. Besides those parameters we are now able to look up-front into the visual appearance of the product using simulation techniques.This paper will describe this updated CAE approach, with a main focus on the new added techniques and modules. This paper will also describe how the results of the approach are used in the development of new TAPS and how we verify the theoretical results by the means of experimental techniques. In general the focus will be on forming simulations for sandwich-like structures, manufacturing tool designing, harmonic and durability simulations.