Abstract

The desire of the modelling of mechatronics system is daily growing. But already at the formulation of aims such simulation there are many different meaning what should deliver  system simulation as resulting output. It is connected together with system responsibility on whole system. Mechatronics systems are naturally domain distributed systems and the main interest on system simu-lation is at the acquisition phase (concept assurance) and at the final phase (functional application the whole system). At the beginning the question is ‘Which components should be taken’? , at last phase will be asked ‘Why it doesn't work how we have imagined it?’. The question, usually coming from management ‘How can I spare money with system simulation?’, should be transferred in another one ‘Can I reach the required quality without system simulation?’. Very often by system modelling there is not enough information about components at project beginning, at the end of it - vice versa: too much information. The next system simulation feature is in it's naturally multi domain character. The boundary condition between domains is known problem almost in every companies. As consequence for system simulation is its membership and place in simulation infrastructure remains open. The system analysis has character of multi criteria because the model behaviour will be estimated from different point of views: mechanical, electrical and etc. from such point of view, BroSAnT (Brose System Analyse Tool) tries to realise the new conceptual solution. The origin of false thinking is the meaning that the system modelling can and should be made like simple joining the modelling of specific domains. In our opinion, only from system view, the necessary modelling level of corresponding domain coun-terpart can be right determined.