While doing an engineering project

engineers always use standard analysis

design methods and notations to assist them to communicate

discuss and document the related results and decisions.In the computer dynamic simulation field

the most frequently used analysis

design method and notation is the information flow diagram.Based on the previous research

an improved

more perfect information flow diagram for modeling and simulation process was presented.Such notation contains three broad categories (variable

directed line segment and boundary) and nine small classes elements

which could completely cover all kinds of mathematical formulas and other model expression ways in the computer dynamic modeling and simulation process.Besides

common combination illustrations and corresponding numerical methods were also been introduced in this paper.And at the end of this paper

dynamic modeling and simulation process of a distillation column is used to illustrate the using process of such improved information flow diagram detailedly.Besides

a large number of applications of such information flow diagram in research issues and engineering projects proves that it could not only provides a perfect communication medium for the simulation related staffs

but also makes people to reuse requirements and design components from the previous simulation project more easily

which could greatly improves the efficiency of the modeling and simulation process and the quality of the simulation model consequently.