[Abstract] Based on the author's many years of experience in engineering construction, this paper discusses his own views on the management and control of engineering investment projects. [Keywords:] construction engineering; Papers and abstracts; Engineering investment control The management of engineering investment project is the management of engineering project cost, which will organically run through the above stages. Thus affecting the decision-making, design, construction and other stages, but at present, many projects still have investment out of control, such as: budget exceeds budget, budget exceeds budget, settlement exceeds budget and so on. The reasons should be mainly controlled in the following aspects: 1, paying attention to the source and strengthening the control of project engineering design. The key of project investment control lies in the investment decision-making and design stage before construction. For a long time, China has generally neglected the cost control in the early stage of construction projects, and often focused on the construction stage. Although this is effective, "it is not too late to mend" and get twice the result with half the effort. To effectively control the project cost, we must resolutely shift the focus to the early stage. At present, it is especially important to grasp the key of design and plan ahead in order to get twice the result with half the effort. Therefore, the project cost control of the construction unit should focus on the design stage, which is the basis for effectively controlling the investment of construction projects. How important the investment management in the design stage is to the cost management of the whole project. For example, a residential district in Luoyang New District, with a construction area of 829 12 square meters, is a garden-style district composed of two 18 floors, two 16 floors and six multi-floors. The total project cost is controlled below 65.438+0.4 billion yuan. In the investment control, the cost personnel conducted expert discussion and careful calculation, changed the foundation treatment method and adjusted some parts. 2. Project bidding is the core to effectively control the project cost. Bidding is the main means to introduce competition mechanism and reduce project cost. The quality of the construction team is related to the success or failure of the project cost control of the construction unit and the satisfaction of the owners with the product development of the enterprise when they move in. Therefore, construction enterprises are required to have sufficient technical strength, which can not only enable enterprises to achieve high efficiency, high quality and low consumption in their own production and operation, but also enable construction enterprises to have the strength to give reasonable concessions to construction units on the project cost. At the same time, it is necessary to strictly grasp the bidding conditions of the project, carefully prepare the pre-tender estimate and bidding documents, and do a good job in bid evaluation and calibration. Based on the winning bid price, the contract and time limit for a project are determined through negotiation. The project bidding should adopt open bidding or invitation bidding. The tender terms should be rigorous, accurate and comprehensive, and the project cost and related expenses should be sealed as much as possible, leaving no or less. After winning the bid, the terms of the contract should be signed carefully and reasonably, so as to minimize disputes between Party A and Party B due to unclear responsibilities in the future. 3. Strengthen contract management to ensure effective control of project investment. As the professional agent of the construction unit in terms of contract and cost, cost engineers or consulting companies should give full play to their professional expertise, effectively control investment and ensure reasonable and optimal cost-effectiveness in the process of drafting contract conditions, selecting bidding methods and negotiating contract amount according to corresponding laws and regulations. When negotiating the whole contract and contract price with the contractor, we should not only evaluate the rationality of the contractor's overall quotation according to the market price, but also pay special attention to the time value of funds to evaluate the balance of the contractor's quotation. At the same time, cost engineers or consulting companies should also abide by fair professional ethics to prevent one-sided compliance with the wishes of the owners and deliberately lowering the contractor's quotation. As far as the construction unit is concerned, it is generally hoped that the project cost will be lower, but from the contract management of the construction industry, it can be seen that the apparent low price often leads to Jerry-building or frequent claims, and even leads to serious events such as construction delay and shutdown. Therefore, reasonable pre-tender estimate and bid evaluation are important means to ensure controllable investment. This not only ensures the reasonable interests of the contractor, but also facilitates the smooth progress of the project, and actually indirectly safeguards the interests of the owner. 4. Strengthen the effective control of project cost in project construction. In the construction stage, the cost of Jian 'an project is mainly controlled according to the construction drawing budget. At this stage, the space saved is very small, but the possibility of waste is great, so we should pay enough attention to the control of project cost. 4. 1 Technical and economic comparison of strengthening construction schemes. Reasonable construction scheme can shorten the construction period, ensure the engineering quality and improve the economic benefit. Comparing and evaluating the construction scheme technically and economically, and comparing the three technical and economic indexes of quality, time limit for a project and cost through qualitative and quantitative analysis can reasonably and effectively utilize manpower, material resources and financial resources, achieve better economic benefits, and control the construction management well, which is an important way of overall cost management. 4.2 Improve the examination and approval system for design changes. If the design changes, first, change it as soon as possible, because the earlier the change, the smaller the loss; Second, before each design change, the increase or decrease of engineering quantity and cost must be analyzed and approved by the design unit. After the change, if the project cost exceeds the total budget estimate, it must be reviewed by the relevant departments, so as to effectively prevent the increase of design content, design standards and project cost through the change of design. 4.3 Strictly control the visa procedures at the project site. Through the construction project supervision system, a special department is established to manage the project professionally with professionals, so as to avoid the serious consequences that the project manager only cares about the visa, not counting the economic account, resulting in out-of-control investment. In order to handle the visa change formalities seriously, the employer, the supervisor and the employer's representative should be jointly signed on site to ensure the authenticity, rationality and economy of the change and visa, and avoid the resulting fraud and economic disputes. 4.4 Strictly control the procurement of materials. In material control, cost engineers should focus on price and quantity and implement material ledger management. Material procurement should try to reduce intermediate links or purchase goods directly from manufacturers, widen the decline of budget price, strive for greater profit space, and focus on it closely to realize low-cost target control of engineering projects; In principle, the quantity of materials purchased shall not exceed the budget. If the actual consumption is different from the budget, it should be carefully analyzed. For the cost control of construction machinery, construction enterprises should strengthen the maintenance of equipment and improve the utilization rate and intact rate of equipment. If it is really necessary to rent external machinery, it is necessary to do a good job of process connection, improve utilization rate and promote its full-load operation. For the external equipment settled according to the completed workload, the original records should be kept and accurately measured. At the same time, the cost engineer should do a good job of collecting and sorting out the original cost data on a monthly basis, correctly calculate the monthly project cost, analyze the difference between the actual cost and the budgeted cost according to the requirements of the target responsibility budget assessment, and take active preventive measures to correct the deviation, so as to prevent the subsequent construction from being adversely affected and causing the cost to get out of control; We should pay special attention to the abnormal profit-loss ratio, find out the reasons in time and accurately, and make cost management develop in a good direction. On the total project cost, the cost engineer is responsible for reviewing and summarizing the direct costs of each type of work and controlling them. 5. Do a good job of auditing the completion settlement price. Completion settlement refers to the final settlement of the project price to the construction unit after the construction enterprise has completed all the contracted projects in accordance with the contract, and the quality is qualified and meets the contract requirements. The audited project completion settlement is the basis for approving the construction project cost. Therefore, the audit of completion settlement is a very important work, which should focus on the following aspects: 5. 1 Audit the accuracy of engineering quantity. Engineering quantity audit is the most important, complicated and meticulous work in the process of completion settlement audit. Must be based on the completion drawings, design changes, the construction site, in strict accordance with the quota of engineering quantity calculation rules item by item audit, to prevent the construction unit in the completion settlement inflated engineering quantity to increase the project cost. 5.2 Review whether the quota application is correct. Review whether the unit price of the listed subdivisional work is consistent with the fixed unit price, and whether its name, specification, unit of measurement and content are consistent with the unit pricing table; For the converted unit price, first check whether the conversion of the unit price is allowed by the quota, and then check whether the conversion of the unit price is correct. 5.3 Review whether the charging standard conforms to the cost quota and related project cost policies during the construction period. 6. Conclusion From the above aspects, it can be found that reducing the project cost is artificial. With the increase of land cost, development and construction enterprises urgently need to raise their own funds, strengthen investment control and reduce the project cost. Therefore, only by effectively controlling the project cost can enterprises gain a foothold in the highly competitive market, achieve better benefits and get higher praise. References [1] Tan Dejing, Du Xiaoling, Wu Yujing, editor in chief. Pricing and control of project cost [M]. Chongqing: Chongqing University Press, 2006. [2] Wu, Feng Zhanhong. Project cost control and management [M]. Wuhan: Wuhan University of Technology Press, 2005. There are many related papers to read.