This article describes a research and development method called the Delphi-Survey. It is a consensual method used internationally within nursing, and fields of application are mentioned. Various types of Delphi-Surveys as well as characteristics of this method are described. Advantages and disadvantages of the Delphi-Survey are discussed based on international research literature. The article concludes with a description of the method that will, hopefully, serve as a kind of application manual. Finally, the authors give examples of how to apply the method within Danish health care.