부산대학교 도서관

Many countries around the world are facing the reality of continuously strengthening their military capabilities by securing as much defense expenditure as possible for their own security while considering the balance with their own national welfare. In this situation, the improvement of the operation rate through the efficient operation of the Air Force Maintenance Depot, which is the highest stage of fighter maintenance, is a necessary condition for maximizing the combat management ability of the Air Force.This dissertation investigated the economic validity of introducing advanced facilities to improve the de-painting process of fighter jets as an efficient operation plan for the maintenance depot. Firstly, fighter exterior painting processes of the Korean Air Force maintenance depot was inspected. The method of de-painting process currently being implemented by the Korea Air Force maintenance depot is carried out in sanding or plastic media blasting (PMB) methods, exposing it to harmful dust and compounds, and consuming a lot of man hours. Since the painting process is a key process for long-term management of fighters, the inefficiency of the existing de-painting method leads to inefficiency in the process, which in turn leads to deterioration of the weapon system’s performance. Therefore, it is necessary to consider the introduction of advanced facilities to increase the efficiency of the de-painting process.Secondly, the de-painting method currently applied by the Korean Air Force and the advanced laser coating removal method of the US Air Force were compared. In addition, cost-volume-profit (CVP) analysis and incremental analysis were conducted. Through the above economic analysis, the optimal time point to introduce advanced facilities was determined and the optimal coating cycle was suggested in terms of economic feasibility.As a result of CVP analysis for the three de-painting methods: sanding, PMB, laser, it was confirmed that the sanding method has economical advantage up to 3 aircrafts, the PMB method for 3 to 20, the laser method from 21 and more. Incremental analysis between the expansion of the existing PMB method and the introduction of a new laser method was performed for decision making under 4 scenarios, the laser method was advantageous for all scenarios. Further incremental analysis between 4 scenarios which were assumed considering by the coating cycle (12 or 8) and out-sourcing shows that choosing a coating cycle of 12 years and reducing outsourcing is most economical.In conclusion, it is economical to introduce the laser method in the short term within a year when the workload exceeds the PMB work capacity (18 units per year), and considering the medium-term volume in the future, it is recommended to keep the current 12 coating cycle and reduce the volume of outsourcing. Moreover, this dissertation provides several implications as follows. Firstly, it would be an example of proving its usefulness as a cost analysis case for a specific core process in the military maintenance depot. The cost analysis of the military maintenance depot has paid little attention to process approach analysis, but this dissertation would be useful as a reference. Secondly, this dissertation shares not only the efficiency but also the information on the application of laser technology. The existing method takes more than one week for de-painting and generates a large amount of industrial waste, but the automated system (laser method) takes less than two days to process and does not expose workers to harmful environments. This can reduces the cost and improves working environment. The current laser removal method developed and applied by the U.S. Air Force was led by the U.S. Air Force's Life Management Headquarters, a robot research center at a private university, and a private company, suggesting the importance of mutual cooperation in the private and military aviation sectors.This dissertation would provide helpful information for decision making to improve the productivity and quality of the Air Force's maintenance depot, when considering of changing de-painting process in preparation for an increase in the volume of painting of fighter jets in the future.Despite these usefulness, this dissertation has limitations that need to be addressed in the future, due to the specificity of the military maintenance depot. If further research is attempted by measuring utility factors in the health aspect such as resolving exposure to harmful environments by maintenance workers, it would be more useful research.