In practice, requirements engineering tasks become more and more complex. In order to ensure a high level of knowledge and training, the International Requirements Engineering Board (IREB) worked out the training concept "Certified Professional for Requirements Engineering", which defines a requirements engineer's practical skills on different training levels. The book covers the different subjects of the curriculum for the "Certified Professional for Requirements Engineering" (CPRE) defined by the International Requirements Engineering Board (IREB). It supports its readers in preparing for the test to achieve the "Foundation Level" of the CPRE.