2.1 System Telecom has chosen to use SSADM, and the data flow diagrams and data models are drawn using SSADM conventions. If you had been responsible for choosing a structured method for System Telecom, which would you have chosen? What would be the reasons for making your choice? There is no reason to assume that, just because SSADM has been chosen in the book, it is necessarily the method that a European-based telecommunications company would have chosen. A survey of European methodologies shows that there are several widely used methods available.