The problem of computer linkage of different mathematical models into a whole system in order to investigate their joint behavior with  more common criteria and constraints seems to receive more and more consideration. Many works on analyzing the behavior of complex systems are based on building large-scale integrated models and sequentials using decomposition and aggregation procedures. In this  article an approach is described which permits the investigation of a set of linked subsystems without explicitly building any integrated model. 



This article represents a description of a particular approach which might be referred to as "distributed modeling". It deals with conceptual  systems in general, which might be used to model concrete systems at any level. The use of the method is illustrated by the practical  application of the development of a system of regional models. This approach, based on the smooth version of the sequential  unconstrained minimization techniques (SUMT), can be considered from a mathematical point of view as  realization of the general decomposition scene.