The second edition of this book is a complete revision, update, and significant expansion of the previous edition. This particularly concerns the presentation and consideration of new legal regulations from the EU and Germany, as well as current EU standards. The discussions on explosion protection, risk assessment, and the legal safeguarding of results have been significantly deepened. Engineering costs account for about 15 to 30 percent of the total investment in plant investments. Engineering provides the foundation for making informed investment decisions and for constructing, commissioning, and operating the facility economically and purposefully. The book serves as a practical guide for anyone involved in the execution of plant projects. Numerous checklists, templates, and examples pave the way for successful engineering.