http://popups.lib.uliege.be/1373-5411/index.php?id=4501 Index terms fr 0 http://popups.lib.uliege.be/1373-5411/index.php?id=4500 The similarities and differences among methodologies and models of complex systems will be discussed from a general point of view. A hierarchical formal concept will be used to explain the systems approach method in modelling of complex systems. The methodology will be applied to a tourism system, which possesses the typical property of global and local organisation. A problem will be studied through multicriteria decision making, representing a good example of an anticipatory system that enables a tourists to make a right decision. Mon, 14 Oct 2024 09:29:35 +0200 Mon, 14 Oct 2024 09:30:02 +0200 http://popups.lib.uliege.be/1373-5411/index.php?id=4500