Research On Improved Earned Value Method Based On Key Chain Technology

Schedule and cost management are the two core contents of project management and play an important role in the whole project.Making reasonable project schedule and cost plan and implementing effective project schedule and cost control are the top priority of project management and directly determine the success of the whole project.In project management,key chain technology is an advanced schedule management tool,which has obvious advantages.The key of project cost management is to analyze the actual cost performance in time,to find out the cost difference and the inefficiency of cost execution as soon as possible,and to take corrective measures according to the result.Earned value method is an effective management method in project cost control.The project manager can compare the key quantity in earned value method with the original plan cost and actual cost of the project,and analyze the deviation degree between cost and schedule.Then,according to the development trend of the current project,the completion period and cost of the subsequent project are predicted reasonably,and the corresponding adjustment scheme is put forward.Key chain technology and earned value method each have advantages and disadvantages.Based on the above two points,in order to implement effective project schedule and cost management,this paper combines the two advanced technologies effectively,and puts forward a new method called to improve earned value method based on key chain technology.Compared with the traditional earning value method,the improved earning value method mainly makes three combination and two innovations.Three combining : improving the earning value method is based on the key chain technology,combining the key chain technology and the earning value method;In order to avoid the earning value generated on the non-critical chain affect the earning value on the key chain,the weighted idea is applied to realize the combination of the weighted and earned value;The earned value method constructed in this paper is applied to the construction project of garden greening,and the theory is applied to the practice,and the combination of theory and practice is realized.Two innovations : First,earn value monitoring point setting,set observation point in resource buffer.According to the related theory of resource buffering,determine whether to join resource buffer area,network complexity,resource tension,activity itself importance degree and correlation degree,combine five factors to make the supply of key chain bottleneck resources.Through the above three combinations and the improvement of two innovations,a set of improved earning value method based on key chain technology is formed to realize the effective control of project schedule and cost.