The purpose of this project was to develop a "meta model"--a plan which could assist investigators in building models--using a computer simulation language. It is based on the assumption that there is a one-to-one correspondence between using a simulation language and building a model. The language selected is the General Purpose Simulation System (GPSS), which is built on the modular or block system. Each block has a specific function and can be arranged in such a way that the arrangement imitates the system under study. There are three steps involved in construction of a model: 1) delineation of system entities; 2) flow charting and selection of GPSS blocks, and 3) simulation. The definition of these blocks and selection of appropriate blocks for a problem are explained. (JK)