IMPROVEMENT of the Evaluation Method for VE Alternatives using the Risk Assessment Process

摘要

Value engineering (VE) is one of the fundamental techniques of the construction management, and it is part of a systematic effort devoted to the functional analysis of facilities designed to achieve the necessary functions at a minimum life cycle cost. Since the success or failure of VE projects depends on the participants' capabilities, it is important to follow systematic procedures. However, although an alternative is suggested in accordance with the current VE procedures in the actual VE task, very often the case is that the alternative is not executed in the following stages, but instead reverts to the original plan. This seems to imply that VE alternatives are not specifically analyzed and evaluated in terms of risk management basis. In this regard, this study proposed a risk assessment process that can systematically analyze the VE alternatives to improve the efficiency of tasks through the prevention of returning alternatives in VE improvement activities. The procedures of this study are as follows. A total of 20 VE results reports were analyzed while expert interviews were performed to analyze VE application status. Based on the results, the problems of evaluation on the VE alternatives were derived, and four improvement directions were set to solve them. Following this, a risk assessment process for VE alternatives was proposed through the introduction of risk assessment procedures, specific factor analysis of the alternatives and IPA techniques. Then, their applicability was verified by applying the proposed risk assessment process for VE alternatives to actual cases and performing expert interviews. The verification results confirmed that the efficiency of VE tasks could be improved by reducing the repetitive work for the returning alternatives.