Application Research On Price Adjustment Formula Of Construction Contract Based On Cost Information Collection And Analysis

Due to price fluctuations,contract prices of construction projects may fluctuate considerably,which requires price adjustment.In the Code for Valuation of Bill of Quantities of Construction Projects(GB50500-2013),the method of adjusting price difference by price index is mentioned,but the method of determining price adjustment factor and weight is not mentioned,and the method of dealing with the information without price index is lacking.Therefore,this method lacks operability in practice.This paper is divided into five parts:Firstly,it introduces the relevant research and application of the current contract price adjustment formula,and focuses on three limitations of the current contract price adjustment formula research:the difficulty of determining the weight of the adjustment factor,the difficulty of obtaining the price index,and the difficulty of convenient application.It also puts forward a solution that combines the existing cost information with mathematical and statistical methods.Limited thinking.Secondly,a cost information acquisition standard is established to meet the requirements of the parameters required for the study of contract price adjustment formula,which can be used for rapid acquisition and analysis of information.The factors that account for the largest proportion of direct project cost are counted by using the case of residential project cost,and the calculation method of weight range using the normal distribution model is determined.Then,the demand of price index for contract price adjustment formula is analyzed,and the method of compiling price index of price adjustment factor by using the model of Parker's price index is determined.According to different demand,the short-term forecasting method based on Grey Theory and the long-term forecasting method based on artificial neural network are determined.Then,on the basis of the above-mentioned theory,an application platform of contract price adjustment formula is designed for all parties of the project,and the existing market price information and project cost information in the database are used to provide reference for the formula parameters of the project to be built.Finally,this paper calculates the adjustment amount of contract price adjustment formula based on recommendation platform method,contract price adjustment formula based on traditional factor cost method and cost information method respectively,and calculates the deviation degree of adjustment result according to the result of cost information method,which verifies the application of contract price adjustment formula proposed in this paper.Rationality.This paper obtains the method of determining the weight parameters of contract price adjustment formula by collecting and analyzing the cost information,analyses and compiles the parameters of price index,and designs the application platform of contract price adjustment formula,so as to solve the limitations of the application of contract price adjustment formula.It is hoped that in future research,the accuracy of contract price adjustment formula will be further improved by increasing the number of sample platforms or combining with multiple formulas.