Dynamic Constraint-based Optimization Algorithm Applied Research Of Construction Network Plan

In project management, progress management has been in an important position. Project planning need to through by the time limit target, decomposing the project, studying out the network planning, and on this basis, establish the resources optimization and cost control. Then it shows that reasonable project schedule management is the basic of project execution, tracking and control, and is crucial to the success of the project. Modern project schedule management is getting more and more complicated, not only request the shortest project cycle, but at the same time should takes the dynamic and conditionality in the implementation of the project into account, put forward request of the optimization of resources and cost. Therefore, the dynamic and conditionality of management in the project schedule management process should be comprehensive considerate, and proposed these new requirements, make the traditional network plan management cannot do the job in the implementation process of the guidance schedule management.The theses systematic introduces the relationship between the project schedule management and other project management, put forward the dynamic constraints to optimize the project schedule. And to investigate the dynamic constraints in construction network from three variables, containing variables changing, constraints changing, and mixed changing, analyzes the influence of it to the time limit, cost and resources in the construction progress. And launched analysis to time limit-cost-resources optimizing from three aspects, one is the period optimization, the second is time limit-cost optimization, the third is time limit-resources optimization. Based on the dynamic constraints, put forward the research concept of network plan multi-objective synthesis optimization, explore the establishment of the evaluation index system, Establishment of the weights, and finally form the model of dynamic optimization algorithm based on the constraint, and through the case to verifications. At present, at home and abroad about the multi-objective synthesis optimization of network plan study also stay in exploration and demons ratable stages, the study of effect evaluation of the related dynamic constraints is a lot, but is not complete. The theses through the method of single fixed target, uses the methods of quantity analyses and quality analyses, study the optimizing of time limit-cost-resource, set up the evaluation model that Multi-objective synthesis optimization of network plan, the theses proposed the schedule management methods based on constraints have a bigger advantage than traditional project schedule management methods in improving the feasibility and stability of the project planed working period.