Issues of computer modeling of multicomponent systems using the domestic visual modeling environment Rand Model Designer. are presented. The focus is on an object-oriented approach to modeling complex systems by large teams of developers, in particular real-time systems modeling. Examples of technology for constructing models from oriented and non-oriented components are considered and illustrated . Recommended by the Educational and Methodological Association for University Polytechnic Education as a training manual for students of higher educational institutions studying in the direction of master's training "System Analysis and Management" . The manual can be useful for students studying in other specialties, as well as for engineers involved in the design and study of complex dynamic systems. It can also be used in training in advanced training systems, in institutions of additional professional education .. ;Griff:Recommended by the Educational and Methodological Association for University Polytechnic Education as a teaching aid for students of higher educational institutions studying in the direction of training "System Analysis and Management"