The book presents around 100 current examples of how energy and materials can be saved in production companies. These examples illustrate the measures that can be utilized in modern businesses to tap into the potential for resource efficiency. The book is aimed at practitioners in companies and consulting firms, but it is also suitable for the higher education sector as a practical introduction to the topic of resource efficiency. The materials used account for nearly 43 percent of the costs of an average industrial company in Germany. In contrast, personnel costs only make up 22 percent, while energy costs account for just 2 percent. If a company wants to save costs, it must primarily consider material usage and produce in a resource-efficient manner. This approach also benefits the environment and reduces dependence on scarce raw materials. However, implementing resource efficiency is not straightforward.