Cost Projections Under The Bill Of Quantities For Study

With the development of construction market,the tradition mode of rating valuation has not met the needs of market-based economic development.At present,in order to meeting the the construction cost need formed by market in construction bid competition,we must reformed the current project pricing method and project detailed estimate norm,and implement the valuation of bill of quantities.Thevaluation mode of bill of quantities is the mode that is in conformity with market economy,allowing contractor unit to offer price independently,determining price through market competition,and integrated into international practice.the crucial problems existing in using bill valuation mode is the construction enterprises should calculate the biding price based on their own ration, but the widely construction enterprises have not construct their own enterprise ration today.First of all, the text analyses the constitute of engineering cost from the basic conception of engineering cost,which supply the analysis foundation for accuracy forecast engineering cost. And put forward to construction cost will be calculated based on bill valuation, average society cost and the component cost .The second is the text make use of fuzzing mathematics and exponential smoothing technology,set up the mathematical model of engineering cost.In accordance with the author'spractical experience in embark construction cost,set up the coefficient chart of fuzzy characteristics relation,as a result,which compare precise ascertain the grade of membership of engineering characterization.Thereby come to the purpose of short-time forecast engineering cost.According to the aspect of collections of the history data, towards the collection or searching instance of the similar typical construction relevant to the pre-estimate construction, the prediction mode can be established in separate way against the ration valuation mode. The prediction-mode formed with fuzzy can be used to issue the cost of pre-construction based on adjoined degree of the typical construction and the proposed-construction. This adjoin degree is established in the engineering characterization list of elements which is established beforehand. With reference to...