Technology Research, Critical Chain Project Plan Based On The Petri Net

As a method of project management, critical chain scheduling method, which has been successfully applyed in some American and European enterprises, and researched in developed countries . Critical chain schedule considers the project as a system to implement its management,CCS has improved Network plan technology in many areas, It has make up the defect of tradition Network plan, which only consider the relations of activities. It breaks the tradition schedule model and proposes the method of planning which faces to project schedule.But, the most research and application of critical chain are in certain networks.Otherwise ,a small in random ,but most are based on the foreseeable, change the random into certain. But there are many unpredictable factors of uncertainty in reality, will make the bottleneck of the resources shifted, and break the original project plan. As mathematical tool and graphical tool, with the graphical intuitive and describe conflict and concurrent. Petri net is considered the most powerful tool to study the discrete event system, it is superior to dispose event of parallel, and it had been successfully applied to the manufacture.So, the advanced theory of critical chain combination of Petri net will be a strong impetus to deal with the uncertainty of the dynamic multi-projects management.The paper based on Petri net theory: Judge the critical chain of project management, make a variety of buffer settings to eliminate the uncertainty of the expected implementation of the projects, and develop the stability of the baseline project plan.then, make a proactive baseline scheduling scheduling and analyze the utilization of unit resource in the projects; Secondly, when a major event occur .It will definitely affect the existing project planning, resource bottlenecks shift also make the projects changed , monitor the unit resource status and establish reactive scheduling , judge the critical chain ,of new projects quickly, and make a appropriate project scheduling.In order to apply the Theory in reality , The article make totality empirical analysis of the critical chain in shipyard projects management, and make a general discuss for the critical chain of the dynamic multi-projects management,and stimulate the project periods through witness simulation software.