Although we live much safer than our uncivilised ancestors, technical products carry new risks into our lives. There would be no progress without taking risks, but risks must be limited to a tolerable order of magnitude. At first sight, it might look cynic to compare risks to human lives with costs to prevent them or to quantify these risks by true or ideal costs; indeed, it is not an easy job to find the legally and ethically right way. Laws depend on the country, and there are cultural differences in ethical considerations. In this chapter, we will learn the basic ideas about functional safety, we will get to know important standards such as ISO 26262 [132] ... [141] and see how much this topic is related to EMC under any possible working conditions. Functional safety is an issue comprising hardware and software, so it is worth to have a look also at software-related practices in order to see if we can learn something for hardware development and in particular for EMC. It should be mentioned that systems profit from simplicity, so increasing complexity of systems tends to impair EMC and functional safety. Besides product complexity, a development which is increasingly distributed over several departments or companies is a challenge. We will see that a systematic approach to functional safety can also improve product quality.