The research investigates the traditional methods of sand casting processes. It also develops computer software called EASYCAST for manufacturing process of sand casting using computer as an aid. A suitable computer programme was developed to implement the algorithm for the computerization process. A life (two practical) components or products was used to test the validity of the computer software developed. In carrying out this research it was observed that some important facilities to achieve a perfect casting were not available. The manual ways of making pattern and mould which was prominent in the developing world for casting (which was not following the full theory as presented in this research) make the work difficult to achieve. This explains the reason for not reaching the 100% close accurate result to that of EASYCAST Computer Software Manufacturing Model developed in this study which is theory based.