Research In Investment Decision Based On The Value Engineering Of Green Buildings

Energy conservation and environmental protection are the inevitable choice that promotes our country to carry out the scientific development concept and build the low-carbon society. But the present situation and the characteristic of the high energy consumption and the high pollution in our constructs, make the promotion of the development of green building become the priority project of energy conservation and sustainable development. However, due to the lack of the correct understanding from the perspective of the whole life cycle cost for green building, poor awareness of the developers, the insufficiency of value innovation; and the lack of a reasonable and effective investment decision-making system in enterprises, the development and construction of green building get difficult.Value engineering as a method of combining economy with technology have the characteristics that research total life cycle of project from the customer demand, and have fully catered to the goal that green building take economic, social and environmental benefits into account and play a very big potency, in the project preliminary decision-making stage particularly in the design stages, and create the advantage particularly for the enterprise plan optimization, the correct decision-making, reducing costs, the promotion for green technology advancement. This article uses the value engineering principle, combined with fuzzy mathematics tool, to propose a simple, feasible, quota and reflected the fact decision method.At first, this paper analyzes the methods and development status of the investment decisions of green building research, pointes out that the tradition decision method only considers the direct economic gain, lack of consideration of enhancing the construction function and the whole life cycle economic efficiency. Then, it establishes investment decision model based on the value engineering of green buildings, uses the fuzzy recognition and the fuzzy synthesis judgment method to compute target cost and the function coefficient, and obtains the value coefficient of each plan.Compared with the traditional method, the decision method based on value engineering could be more comprehensive for appraising the green construction's design implementation plan objectively. Finally the paper carries out verification on the decision making by a green residential district example.