Study On Objective Integrated Control Model Of Engineering Projects Based On Reliability Theory

An engineering project is a complex system, according to the theory of systems engineering, a part of the project, a single project does not make the whole project best necessarily. Project management is a goal-oriented, which is one kind of goal management. As the main objectives of the project, the integrated optimization management of the three objectives of quality, cost and schedule has always been a problem needing to be given more attention. With the improvement of the level of project management, safety and environment also have caused much attention by construction units, the three project objectives have become five objectives, including safety and environment. Only from the point of the whole goal elements, consider the goals of the project comprehensively, and conduct integrated management, namely making the trade-offs among the various objectives, finally get the whole project objectives to achieve optimal effect. In order to conduct integrated management among cost, schedule, quality, many domestic and foreign scholars study integrated management of the project objectives. Although these studies made a lot of theories and methods, because of many assumption and computational complexity, the operability and practicality are not high. Therefore, how to make the objectives more balanced is becoming more and more difficult, and how to integrate cost, schedule, quality, safety, and environment is another challenge for the integrated management of construction projects objectives, which has some theoretical and practical significance.Based on the research status of objective control theory of engineering projects, this article firstly analyzed the system components of engineering projects, gave the reliability control standards and calculation methods of five goals in subsystems, proposed the control theory of subsystem reliability for five goals, got the objective-integrated approach of subsystem reliability. Then, based on a certain-level engineering, obtained the minimal path sets or minimum intersections of next-level engineering systems, used disjoint method to deal with the minimal path sets or the minimum intersections, and could get the reliability of X-level engineering systems, then combined the known reliability control standards to assess project reliability, finally established the objective integrated control model of engineering projects based on reliability theory. The objective integrated control model can have control on a single project, and take control of the entire project. The model can achieve efficient management and achieve management objectives, which will allow construction project management method to be more suited for the actual needs of construction projects. This model has a very important theory and practice significance for the principles, methods and techniques of objective integrated management. Finally a simple example proved that the proposed objective integrated control model is simple and practical.