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Due to the diversity of the construction market, we need to select from a large number of typical projects as the research foundation to compile the cost index. Reasonable screening process and method plays as an important factor in the determination of the accuracy of the final result. This paper recommends a typical project selection process, in accordance with the results of the economic analysis, and the introduction of mathematical methods on the basis of expert advice on the adoption and also recommends that the selection should follow the principles of statistics, that is, the selection shall be taken according to expert selection method and gray correlation .T test method screening model is applied after the completion of typical project data collection thus the statistics which disturb the release of the index shall be eliminated so that indices and indica tors released can better adapt to the actual situation.

Screening Model Study on Construction Cost Index Calculation Information