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Comparative analysis of the Public works construction managementAbstraction：There are some advantages and disadvantages during the traditional mode of public works construction management, building center and construction agent in public worksKey word：public work，management.Traditional construction management mode can make a solid foundation for the carrying out of the projects, and that is because the government plays an important role in public works and they have a good cooperation. In the other hand, the owner status is unclarity under this mode, moreover, it also brings out trouble waters in management and will have bad influence in supervision mechanism. In the background of the mode, the project management is backward and the risk aversion mechanism is not perfect, the investment benefit and social benefit for the government is not perfect. First, building center mode is realizing the centralized management, making the main responsibility clear, and resolving the problems in the phenomenon of the absence of specific oversight of the government investment projects, it can help preventing corruption, which brings out a certain degree of centralized management. There are a number of professional and professionals and technical will be trained well. Compared with traditional construction management, achievement projects undertake a government investment projects, and carry out by the planning department, the formulation of the base bid and the contracts must be reviewed by the audit department. The project bidding including the bidding units prequalification must accept the supervision of the City Construction Bureau. And the project funds are paid directly by the Bureau of Finance, and accept the supervision of it. It can be said that, the construction center is to be responsible for the quality, safety, and duration of construction projects, it has no right to control i the other key issues. Especially the implementation of fiscal consolidation pays for projects uniformly, and that makes the construction of the center become a veritable blank checks. Engineering construction center just invest on his behalf, it did not solve the problem of the role of government confusion completely. There is no better incentive and monitoring mechanisms for it, lacking of initiative of the constraints investment cost makes construction of the center establish to increase the government establishment and financial burden, With the increasing in government investment, the construction center will be at a loss, and it will be limited by the subject to the annual scale investment.Secondly, construction agent in public works can play its role of social intermediary institutions and professional management well. Because it is a model for phase separation Agent Unit and use units, which is the further deepening of the reform of the investment system and agrees with the reform government investment project management mode principles. Because of the relationship between the agent and the principal, the construction agent has the responsibility of exercise investment as a non-government organization and is responsible for government, it also can strengthen budget constraints, the professionals were involved in the preliminary design stage and they participated in the whole process in the management. Although, the pre-management fee was increased, the effective of investment constraints and controlling investment is available. The disadvantage of it is the supervision of the government at this stage indirectly, and it may even be weakened, and at the same time, the efforts of construction management and coordination were weakened, which may create some bad influence in public works. In most cases, the project bidding project management company is responsible for producing the phenomenon of runaway government investment. At present, the various oversight mechanisms at this stage is not perfect, which may lead to a bad phenomenon of running out of control of working management.The mode of management was intervened by government can resolve the financing problem, it can help clear the main part of investment responsibility.The relationship between agent and principle can not control the management well. Through this way, the government can get more social funds and helping absorb social funds and expanding the financing channels for government investment projects. Compare with foreign government project management mode, it can be found that the creation of specialized management agencies of the government investment projects in Hong Kong, such as Works, centralized and professional management, are more appropriate. the establishing of public works construction center also base on the real practice. In Britain, they set up the government projects according to their specific nature and adopt different management mode. Through the analysis, it can be found that Britain supports to establish some independent mechanism to invest and use land. Though the institutions responsible for works is setting up wholly owned by the government, the management, such as financing, inviting public bidding, daily operation, and other projects about management. In foreign countries, they usually adopt the management mode of private engineering, and it also named BOT, that is because the public works can get a steady return of investment. For the projects invested by government, they take the special government agencies to realize, the management of this is closed management, self-organized construction and management. For construction system, take Singapore as an example, the owners of projects entrusted to engineer consulting firm (usually a design company) to carry out the project feasibility studies, architectural design, structural design, construction bidding, construction supervision and final acceptance. . This is the CM mode. Pure industry management behavior plays a government role of guidance, coordination, service, and supporting, it doesnt involve the internal management of construction enterprises, and it does not other investment activities directly. In fact, it is an i