The objective of this research is to optimise the injection moulding parameter to control shrinkage and warpage of snap fit product throughout Taguchi Method in practical injection moulding. In this practice, the selected parameters were barrel temperature, holding pressure, injection velocity and injection holding. The material that was selected for this project was a mixture of polypropylene and nanoclay with the addition of 15 wt.% of Polypropylene Grafted Maleic-Anhydride as the compatibilizer. Two formulations were chosen, which was 0 wt% and 4 wt% of nanoclay loading. The design of experiment for this project had used the L₉4³ Orthogonal Array. By using the Signal to Noise Ratio responses, the optimum parameter for each formulation has been obtained. Analysis of Variance was used to define the most influential factor that contributes towards the quality of samples. Based on the results,  the optimum parameters to control warpage and shrinkage have been rectified. The most influential factor that affecting warpage is injection holding with 37.30% of the contribution. As for shrinkage, this factor need to be closely monitored as well, whereby it contributes 68.54% towards shrinkage .The findings of this experiment shall be useful for future manufacturing process which was related to this sample and material.