Research Of Life Cycle Engineering Cost Control

Against the background of economic globalization and socialist market economic system, the change from management of whole process project cost to management of life cycle cost is an inevitable trend. Management of life cycle cost is a method which can realize life cycle including build period, operate period and demolish period total cost minimum. It considers cost of building and operate fee comprehensively to realize scientific policy decision and the aim of cutting down life cycle cost under the premise of ensured quality and application function.On the basis of construction cost history review and analysis of whole process project cost limitation at present, this paper comprehensively introduces the theory system of life cycle cost of construction, application prospect and practical significance, and then by the center of the calculation and optimization of cost structure, divide the life cycle cost content scientificly, and establishes a estimation model of project building cost based on unascertained mathematics; According to the basis that unascertained mathematics can resolve the uncertainty effectively brought when the decision-maker can not define the true condition and quantitative relation between the object because of the condition restrict, this paper elaborates the feasibility of using it in life cycle cost control. It also establishes a fast estimation model of project building cost basedon unascertained measure and model based on the algrothm of unascertainty to estimate the operate cost of the construction project. The example calculation indicates that building period's cost forecasting effect is notable, and the fitting measure is high, the assumed value points of operating cost in the final estimation are more delicate and more intensive, the raw estimate space is shrinked. Make analysis and comparison of the cost of every stage of life cycle to provide consultation to investment decision and project design. Through the research, this paper has innovations as follow:(1) This paper comprehensively introduces the-theory system of life cycle cost of construction, and the feasibility of using it in project practice. Based on predecessor's division of life cycle cost stage, this paper kneads the life cycle cost content together again in order to calculate and control conveniently.(2) It proposes a estimation model of project building cost based on unascertained mathematics (divide into building period cost estimation model and operating cost estimation model), and confirms the feasibility and validity by example.