방산물자 원가산정에 있어 학습율 모형 적용방안

The learning effect as a tool of strategic cost management directly affects labor cost contained in the manufacturing cost. It allows the CEO to have a strong incentive for cost management or earnings management applying estimated amount based on ‘learning rate model’. Generally if the same production process is repeated, learning effect occurs and helps reduce labor costs. Especially for the case of defense contract, contract amount is determined either at the beginning based on the estimated amount or during the contract period based on the actual amount occurred till that point and the estimated amount after that point together. Before making contracts, cost data submitted by companies are throughly reviewed. But we have been having a hard time in calculating labor man-hour due to the different cost systems across companies. Therefore, precise cost estimation considering learning effect on the direct labor costs has been one of the long-cherished ambitions in the cost management field. This paper explores whether learning effect exist in the defense articles manufacturing industry and suggests ‘the standardized learning rate model’. The result shows that among six different models, ‘modified incremental marginal time model - learning curve model(ⅱ)’, which calculate learning index based on the value of first manufactured unit and the last real man-hour of calculating unit, is the most suitable estimating model for the contract cost estimation. * Professor. College of Business Administration, Seoul National University ** Doctoral Student. College of Business Administration, Seoul National University Identifying the best suitable model, based on the learning effect, through thorough examination of management environment of each company and actual man-hour data will give us an opportunity to rationally estimate the R&D and manufacturing costs of main equipment. The amounts based on the model will also give us room for rational budgeting, minimization of conflicts among the interested parties regarding their different views on ‘labor man-hour’, and even reasonable cost compensation by inducing companies to put more efforts on reducing costs.