1. An apparatus for analyzing a physical or produced system based on linear systems applied to a terminal part system (TPS) based on a decomposition method for finite element modeling or partial differential modeling, comprising: an input device for receiving information data on a number and shape for decomposing a modeling system to input parts; a generating part device which decomposes a modeling system to a number of parts using the information data; a solver(a) device for each said part; a generating node block which arranges nodes on an object, selects a node for deciding itself, numbers its node as a kth node; a generating element block which constructs only elements of relating to the selected kth node by dividing an object in accordance with a design of the shape data and numbers its elements; a generating element equation block for generating element equations from the elements generated above; an assembly means for assembling the element equations connected to a selected node; a memory block for storing the assembled element equations; a generating block for generating nodal equations which generates the nodal equations for the kth node by selecting the equations connected to the node from the element equations stored in memory block; a PSS equation-making block which assembles the node equations and boundary conditions of kth node into a basic PSS equation; a PSS equation-determining block; a memory block for storing the basic PSS equation; a judgment block for determining if the kth node is the final node. a solver(b) device for each said processing part; a means for producing an interface terminal part for each part; a means for producing a package for groups of similar part; a means for producing an interface terminal part from the package; a solver(c) device for assembling the interface terminal part to produce a system of equations representative of the system before decomposition; a solver(d) device for each said processing part; a means for determining the state of the interface terminal nodes and all nodes by backsolving technique; a storing device for storing a basic PSS equation of each said processing part; and representing device for presenting the simulation result obtained.