Abstract: Often times, admixtures such as sawdust ash (SDA) are added to raw mixes of burnt bricks in order to modify the properties or reduce the cost of the final product. This article present computer programs based on Simplex and Regression Theories, for the determination of the optimum percentage of saw dust ash to be added to clay in order to produce burnt bricks of optimum compressive strength. Bricks of optimum mix would in its finished state, satisfy at minimum cost, the required performance determined by its application. Besides, the compressive strength of SDA-clay bricks obtainable from a specified mix proportions of its constituents and vice verse. Comparison of the results determined by computer programs based in Scheffe and Regression Theories, showed that there is complete agreement between them. The two computer results, also agreed with the experimental results.