Forest management has to respond to the needs of our society. For some years, forest is more and more considered as a shared property, also used for natural preserving and recreation. Besides, a growing people wants to take part into (near-)natural areas management considered as a natural heritage. So, forest lands, usually managed for timber production, have to serve other purposes and need adapted management framework. The main goal of this research is to develop a framework and adapted tools to work out integrated forest management. A modelling system is elaborated to generate, evaluate and compare integrated forest management alternatives. The comparison between forest management options should integrate criteria concerning all thefunctions that forests could fulfil. These functions express either economical, ecological or social needs of our society. The management options result from the knowledge of social and environmental constraints and potentialities. The scenario modelling aims at describing the stand evolution and predicting the outcome of management actions and their consequences on the forest characteristics. Multicriteria decision making methods are finally used to evaluate and compare management alternativesat the management unit level. This methodology is applied to integrated management of forest lands in the south-west of Belgium. A decision support system software is developed to generate and compare the silvicultural component of managementalternatives adapted both to uneven-aged broad_leave stand and coniferous even_aged stands. Silvicultural, ecological and financial criteria are especially considered to evaluate and compare the silvicultural scenarios, using multicriteria decision making methods, and more particularly the ELECTRE III method. Some forest stands are selected to test the system and to bring out both the interests and the limits of the method.