Abstract

After a presentation of the cereal activities in Tunisia, we present, according to a systemic analysis approach, the grading system of cereals. A model describing the functioning of the complex system was established and was allowed the identifying of the information that ruled it. An information matrix was defined and elaborated, it enables the one hand to identify the produced and consumed information concerning each activity and on the other hand to determine the relations between the activities of the complex system.

Key words: Grading system, complex system, information system, OOPP method.