The interaction specification describes the composition regarding content and structure of an application as well as its interaction and reaction manner in all features. For this purpose describing texts and screen flows illustrate all system reactions from the structure of information and navigation, via all interaction principles through to the error messages.
The interaction specification builds the key medium of communication for application description. The interaction specification of a basis concept serves the customer´s agreement as well as user researchers for developing the first UX test. The description of a fine concept serves developers for implementing the front end.