In case of new shipbuilding or ship repair, most of industries are labor-oriented, and their labor cost is comparatively higher than other industries. Limited skilled workers are available to work in this vast sector. Consequently, there is a constant need for ship maintenance workers, which increases overall labor costs. In this sense, labor cost is a significant and crucial issue for the ship repair industry. Labor expenditure carries a good portion of the repair bill for regular or routine repair works. In some cases, the amount of labor expenditure caries 60-70 percent of the total bill. Lesser man-hour can be converted into a lower final bill. It increases the dockyard capacity, ultimately keeping the position high in the competitive market. In this study, a method has been developed to formulate the mathematical model to estimate the ship repair man-hour for different types of vessels. To summarize the method, an algorithm has been established where all the steps are shown step by step. Multiple linear regression theory along with the least-square method has been used in this method. For the proposed method, man-hour is considered as the dependent variable whereas ship’s age, displacement, and repair works are the independent variables. In conclusion, the primary aim of this article is to show how to build a mathematical model for estimating ship repairing man-hours, which will help management give better service and support.

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