Abstract: Main objective of the presented paper is the examination of the professional knowledge used in intelligent software applications for process controlling. It
concerns in particular the user instruction and the realization of corresponding interaction as well as the interface design. Regular approach for service of the different user groups is evaluated and extended in means of flexibility in the time. The rules decisive for the user interaction with the application are outlined. They represent the interdependency between quality of professional knowledge to be utilized and user group characteristics alter in time. An application scenario for knowledge visualization is presented to show the practicability of the concept developed.

Key words: Intelligent controlling system ,  Levels of decision support ,  Professional knowledge ,  Process controlling