A rectangular composite laminated panel is optimized in terms of mass (weight reduction) using MATLAB programming code. The first level of optimization process deals with failure resistance and defining the minimum thickness of the overall plies and percentage in each fibre orientation. The fibre orientation used are only limited to a sets of (0°, 45°, -45°, and 90°). Rounding process was done after obtaining the minimum thickness of the overall plies and percentage in each fibre orientation. The final results of the entire optimization process program are number of the plies in each fibre orientation.