For analysis and simulation, we use established techniques and software products. Our expertise lies in solving complex engineering problems, not in producing sophisticated code. When required, we can extend known methods with dedicated applications. Also, we have developed a lumped-element modelling (LEM) suite, dedicated for thermodynamics (including cryogenics), which includes off-the-shelf and proprietary components with detailed specifications. We use simulation techniques such as FEM and CFD to predict the accuracy and stability of entire systems, even before a first prototype has been realized.