With the gradual establishment of China's market economy and the inevitable requirement of the integration of construction market with international management after China's entry into WTO, it is imperative to standardize the pricing behavior of construction project contracting, safeguard the legitimate rights and interests of both contracting parties, effectively prevent corruption in the construction market, and fully implement the bill of quantities pricing of construction project cost management. This paper analyzes the significance and existing problems of carrying out bill of quantities valuation in China at present, and gives the methods to solve the problems. 1. Significance of bill of quantities valuation 1. 1 Bill of quantities valuation is the need to standardize the order of the construction market and promote the healthy development of enterprises. Under the valuation mode of bill of quantities, the tendering unit prepares the bill of quantities and bears the risk of quantities; The contracting enterprise adopts the bill of quantities quotation, analyzes the cost and profit of the unit project, makes overall consideration, carefully selects the construction scheme, and reasonably determines the input and configuration of personnel, machines and other elements according to the enterprise quota, thus determining the bidding price. The publicity of engineering quantity will avoid the irregularities such as fraud and black-box operation in project bidding. 1.2 bill of quantities valuation is conducive to the transformation of China's project cost management functions. The government will carry out the project cost management idea of "macro-control by the government, independent quotation by enterprises, price formation by the market and comprehensive supervision by the society". 1.3 bill of quantities valuation is to meet the needs of China's entry into WTO. Bill of quantities valuation is an internationally accepted method. The implementation of bill of quantities valuation in China is the need of China's entry into WTO and the gradual integration of engineering construction with international standards, which is conducive to improving the management level of engineering construction and the ability of domestic construction subjects to participate in international competition. 2. Problems in the valuation of bill of quantities 2. 1 The imperfection of the valuation standard hinders the development of the bidding of bill of quantities. "Valuation Code" is the first standard code for valuation with bill of quantities issued in China. Due to the writer's lack of experience, there are many imperfections objectively. The list items involved in the valuation specification are somewhat different from the actual situation of the project, and many problems are exposed after implementation, which is not conducive to the smooth bidding of bill of quantities. For example, some list items contain too much workload, which brings a lot of trouble to the price adjustment of list pricing and settlement; The calculation rules of earthwork volume in "Valuation Code" do not include the working face and slope coefficient, which makes the difference between the listed quantities and the actual excavation earthwork volume too large, which is not convenient for understanding and measurement and valuation. 2.2 Lack of contract management mode matching the bill of quantities At present, the common problems in contract management of construction projects are: some construction contract managers have a weak awareness of laws and regulations, lack the necessary contract knowledge, and there are many mistakes and omissions when signing contracts. In particular, the contract price adjustment method, claim settlement and other related terms are unclear and lack of operability, which affects the valuation of bill of quantities. Although China promulgated and implemented the "Construction Contract (Model Text)" in May 438+0999+February, there is no new contract management mode after the implementation of bill of quantities valuation. 2.3 Enterprises lack the ability to quote independently. The key to the implementation of bill of quantities bidding lies in the independent quotation of enterprises. However, due to the constraints of its scale, technical strength and professional level of personnel, most construction enterprises have failed to formulate their own enterprise quotas, and they still follow the previous quota pricing model when formulating comprehensive unit prices. 2.4 The overall quality of the cost employees is not high, which leads to the low quality of the compilation and valuation of the bill of quantities. Many cost practitioners have a little knowledge of the valuation mode of bill of quantities and the bidding of bill of quantities, and their understanding is not deep enough. In addition, the compilation and valuation of the bill of quantities require the compilers to master the construction technology, while some business personnel lack professional theoretical knowledge and construction site experience, and are not satisfied with the quality of the compiled bill and comprehensive valuation. 2.5 The market information channel is not smooth enough. When enterprises participate in bidding, they lack understanding of market prices and analysis of risk factors. Their quotation completely depends on the budget quota and the pricing table of regional units, and the quotation cannot reflect the individual cost and market price level of the enterprise. Due to the lack of basic information accumulation in enterprises, a large number of professionals flow to private enterprises and intermediaries, and it is difficult to establish enterprise quotas in a short time. 3. Countermeasures for effective implementation of bill of quantities valuation 3. 1 Carefully compiling and reviewing the bidding documents and establishing the bidding document review system, as a programmatic document of the whole bidding process and even the whole project implementation process, are the keys to controlling the whole project cost. As an important part of bidding documents, bill of quantities is the core content of the whole project cost control. Under the current bidding system, most owners entrust qualified intermediaries to prepare the bill of quantities and the corresponding pre-tender estimate. The preparation of the bill of quantities must conform to the requirements of the tender documents, and the work contents and requirements of each subtitle should be accurately and completely expressed. We should try to reduce the number of tentative projects and prevent the increase of project costs in the future. 3.2 Attach importance to contract signing and standardize contract management. When signing a construction contract, we should follow the laws and regulations of the construction industry, clarify the ways of engineering change, claim, payment and contract price adjustment, clarify the rights and obligations of both parties to the contract, and introduce the lawyer management mechanism, which not only ensures the quality of contract signing, but also makes the contract signing more standardized and standard. Moreover, the management of the construction contract is strengthened, the visa behavior in the construction process is standardized, and unnecessary disputes are reduced, thus ensuring the smooth implementation of the bill of quantities valuation. Strengthening the filing system of construction contracts is an important measure to standardize the construction market and ensure the smooth performance of construction contracts. Through the construction contract filing system, the contract terms are checked to make the construction contract legal, rigorous, complete and accurate in text expression. Perfecting the construction contract filing system can prevent contract disputes and improve the contract performance rate. 3.3 In order to be in line with international standards and adapt to the valuation mode of bill of quantities, construction enterprises should constantly improve their management ability and competitiveness, and increase enterprise quotas. 3.4 To establish a good information channel, we should further improve the construction of the engineering cost information network, collect and calculate the market supply and demand, the price of equipment and materials, and the average social cost, and analyze its development trend. By releasing the price information of labor, materials and machinery production factors and the project cost index in time, we can guide and standardize the pricing behavior of all parties in the construction market and enhance the social effect of price information service. 3.5 Accelerate and improve the pace of building market intermediaries. Because of the particularity of building products and their production process, and the information asymmetry between owners and contractors, engineering intermediary is particularly important. We should give full play to the professional advantages of intermediary agencies, vigorously expand the bidding consulting business, improve the professional quality of personnel, accumulate work experience and adapt to the new bill of quantities pricing model.

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