The Study Of The Engineering Cost Estimation On CBR

In the process that China underwent the transformation from the planned economy system to the market economy system, the disadvantages of the old management pattern of the engineering cost, which blocked and astricted the development of the industry to some extent, was discovered. Under the new conditions, it's an urgent problem that faces us how to syncretize the engineering cost management in China with the world trend and the international convention. Nowadays, it's an inevitable tendency for the engineering cost management that we should speed up the reformation of the engineering pricing pattern to approach the international convention.After the theoretic exploration and practical effort of many years, the engineering cost estimation plays a more and more important role in the engineering cost management. On the stage of giving a decision on the investment, we should try our best to estimate the engineering cost quickly and exactly, which will get the engineering cost during the whole process of the engineering cost management under control, increase the investment profits and the social benefits, and reduce the loss of the fixed capital of our country. In the recent years, Case-Based Reasoning(CBR), which happens to have the same view as the practice of estimating the engineering cost, has been of great importance in the field of artificial intelligence, so CBR can be used to solve the problem how to estimate the engineering cost. Owing to this, the thesis puts forward the study topic- the application of CBR to the engineering cost estimation.Based on the study and inheritance of the domestic and overseas achievement in the related field, this thesis makes research into the theory and application:On theory, this thesis puts forward the concepts of Engineering Cost, Engineering Cost Management and Engineering Cost Estimation, analyzes the relation between them;And it introduces the factors which influence the engineering cost estimation, then puts forward the study of the methods;It particularizes the common methods of estimating the engineering cost, introduces the principle, the operation and the application condition, and analyzes the advantages and disadvantages of each method;By introducing the mention, the principle, the reasoning process and the comparison with the traditional reasoning mechanisms, it makes out the essence of this method, and views it as a whole.On application, this thesis understands the object in this study deeply, and analyzes the necessity and feasibility of the combination of the engineering cost estimation and case-based reasoning;It sets up the system which estimates the engineering cost on CBR, synthesizes the arithmetic of the system by using fuzzy mathematics, grey theory and operational research;And it analyzes an example with the theories and methods stated above, then realizes the tentative study of the engineering cost estimation based on CBR, which approves the thought of solving the engineering cost estimation problem by using CBR.