Research On Schedule Management Of Critical Chain Project Considering Information Exchange And Multi-resource Constraints

With the development of society,the project becomes more and more complex.The complexity of the project is not only because of its huge scale,but also because of the complexity of its internal and external environment,technology and dependence between activities,which makes the uncertainties faced by the project more complex and increases the difficulty and complexity of project schedule control.The critical chain technology is a new project schedule management method with its unique innovations,which largely compensates for the shortcomings of traditional project schedule management methods.In view of the shortcomings of the existing research on critical chain and the limitations of its application and promotion in complex projects,the paper proposes to introduce DSM theory into the practical application of critical chain,based on this,an improved model of critical chain project schedule management is constructed.The main work is as follows:(1)In view of the limitations of existing critical chain identification methods,the critical chain identification model for facilitates project optimization is established.According to the characteristics of the project,to measure the importance of activities to the project: analyze the feedback of activities and its rework impact through DSM matrix;in order to better measure the comprehensive constraints of resources on activities,the differences of resources are deeply analyzed,including the risk of resources and the intensity of competition among activities.;and analyze the scope of continuous impact of activities.Based on the above analysis,the priority of activityadjustment is established to identify the critical chain,and then the space for further optimization of the critical chain is analyzed based on DSM matrix,which provides a new idea for project duration optimization.(2)Combining with the actual implementation of the project,the uncertainty of activities is measured comprehensively,and an improved buffer setting model is proposed.Considering the relativity of activity duration,the information interaction process and rework risk under different execution modes are analyzed by DSM matrix to measure the degree of information constraints on activities,considering the differences of resources to measure the degree of resource constraints on activities.Based on the above analysis,the link initial buffer setting model is established and modified to make the buffer setting more reasonable.(3)Aiming at the shortcomings of existing buffer monitoring methods,in order to improve the project completion rate on time,this paper proposes a real-time dynamic buffer monitoring model based on project-activity integration,which realizes the unification of buffer monitoring from project level to activity level.Considering the difference and correlation of activities,a real-time buffer redistribution mechanism is established to track and predict the performance of links,determine the trigger time of monitoring,which realizes the unification of activity implementation and the overall progress of links.Combining with the risk elimination ratio of links,the buffer deviation of links is dynamically analyzed,the monitoring benchmark and the action decision matrix is adjusted periodically,which realizes the combination of the implementation of links and the overall progress of the project.The critical chain project schedule management model constructed in this paper,to a certain extent,makes up for the shortcomings of the existing key chain project schedule management model,and combines the advantages of DSM theory and key chain,which has a certain role in promoting the application of key chain technology in complex projects.