Simulations are an integral part of the development of medical devices. Optimizations can be simulated and carried out even before the test phase begins. This leads to a significant reduction in prototype tests and unavoidable animal testing.In medical technology, the trend is also towards “medical remanufacturing”. This means that one-way becomes reusable, the recycling of plastic medical products is unavoidable for reasons of environmental sustainability and scarcity of resources, requiring targeted product adaptation in terms of dismantlability, repairability and sterilisability. Here, too, the use of targeted simulations is useful.