For aviation industry and facilities, safety is the most sensitive issue to consider at each processes. This is because a minor mistake can result huge problems and can significantly affect industry and corresponding facilities. In this paper, a DMAIC approach to improve on safety performance using Safety Management System (SMS) is illustrated at the Kuwait International Airport (KIA). The paper shows an implementation of such a system reduces the rate of accidents along with their costs, increases the productivity of the place, and meets the legal specifications needed to insure safety at airports. Several hazards with the suggested preventions to control these hazards were illustrated. The DMAIC methodology is used to describe the hazards and how they should be improved and controlled. A Fault Tree Analysis (FTA) technique is applied to investigate the hazards. At the end, SMS was proved to be an effective system to apply at KIA.