The design-in process begins with an analytical approach. Using the electrical-thermal analogy, users can estimate if the solution they picked initially is the right one for their design. This tool is great as an estimation tool as it will point them in the right direction, but it is not a design tool. For that, Würth Elektronik has FEM simulators, which can compute complex systems and evaluate their designs. To help the designer, Würth Elektronik has ANSYS models of their solutions available. Prototyping and experimentation will confirm a design and can still leave room to test different solutions.