Research On Optimization Management Of Highway Construction Projects Based On Fuzzy Improved Critical Chain Method

In the process of highway engineering construction in China,there is a problem of blindly rushing work and ignoring the cost while meeting the quality requirements.Although the goal of progress is achieved,cost overruns occur.As an effective schedule management method,the critical chain project management method has the advantages of resolving resource conflicts,comprehensively taking into account various uncertain risks in the construction schedule,and effectively monitoring the implementation of the construction project progress to ensure that the construction project is in progress.It is completed within the schedule,so it has been widely studied and applied in recent years,but this method often assumes that the cost is not considered,and only optimizes the management of the schedule.Therefore,in view of the construction of highway engineering projects,fully considering the cost and improving on the basis of the advantages of critical chain project management,this paper proposes a research method of highway engineering project optimization management based on fuzzy improved key chain method.This paper introduces the idea of multi-objective optimization into the project management of the critical chain,fully considers the cost of highway construction,and improves from three aspects:the determination of the expected construction period of the construction process tasks,the setting and monitoring of the critical chain buffer.First of all,the paper uses the multi-objective optimization theory,based on the fuzzy representation of the construction process period,in the most possible interval of the fuzzy construction period,makes a concrete analysis of the highway schedule-cost optimization problem,and establishes a single schedule objective function and cost objective function respectively.Based on this,multi-attribute utility function was introduced to construct a construction schedule-cost optimization model of the most likely interval of the fuzzy construction period,and the genetic algorithm was used to solve the corresponding construction period combination when the schedule-cost was optimal.Secondly,the idea of multi-objective optimization is introduced into the key chain project management,the method for determining the expected duration of the construction process is improved,and the construction process duration when the schedule and cost are optimal as obtained by the solution is taken as the expected duration,and on this basis,the corresponding The extraction of safe time,the problem of resource constraints is solved according to the principle of minimum time difference,and the key chain is determined.At the same time,this paper considers the main uncertain factors in construction,improves the setting of buffer zone,and carries out dynamic buffer zone monitoring,so as to realize the optimal management of construction progress and cost of highway engineering projects.Finally,taking concrete highway construction as an example,the rationality and effectiveness of the optimized management method of highway construction project based on fuzzy improved key chain method proposed in this paper are compared and verified.By comparative analysis,it is proved that the optimized management method of highway construction projects based on the key method of fuzzy improvement can not only effectively realize the optimized management of progress,but also optimize the cost at the same time.It provides theoretical support for the construction progress-cost optimization management of highway engineering projects.