In the aviation sector, supply chain management is critical for reducing operatng costs. The performance of a corporation is ddetermined by how successfully it implements the supply chain strategy. This research aims to propose the improvement in the field of business process improvement (BPI) and supply chain management (SCM) processes in the international airline industry. Improvisation of efficient SCM has dramatically changed the way organizations conduct business by implementing procedures that can improve process efficiency, reduce costs, and improve the organization's performance. This paper leads to formulating the concept of an effective model of the SCM process for Pakistan Int. Airlines (PIA) taken as an example and obtained results can be implemented on any international airline as well. BPI provides competent strategies for the target organization keeping in view the implementation of the proposed SCM model. Simulation analysis is executed using the ARENA software tool to analyze the performance of the proposed model. Ttest has been taken into account to demonstrate the competency of the proposed SCM model. It is observed that the implementation of effective business techniques in the SCM process can lead to enhancing the efficiency of a target organiattion.