基于关键链技术的进度管理方法研究

Research on Schedule Management Method Based on Critical Chain Technology

关键链技术是一种项目进度管理的新方法,近年来国内外学者对关键链技术的研究逐渐增多。对于关键链技术的研究主要集中在解决缓冲区设置不合理带来的项目间工序松弛、工期延误等问题,基于信息熵理论,建立了可以综合考虑整体复杂熵、单一复杂熵、施工难度熵、资源约束熵、决策者偏好因素的新的缓冲区设置模型,并结合根方差法改进了缓冲区计算公式,然后将冗余缓冲整合到项目缓冲之中,通过吸收可能出现的风险来对缓冲区设置模型进行修正,最后通过算例验证了模型的实用性。研究表明该模型能够更为合理与全面地量化风险因素对项目进度的影响,提高缓冲区设置精度,有效解决由于汇入缓冲过大可能造成的系列问题。

Critical chain technology is a new method of project schedule management.In recent years,scholars at home and abroad have increasingly studied this technology.The research on critical chain technology mainly focuses on solving the problems of inter-project operation slack and construction delay caused by unreasonable buffer setting.In this paper,the information entropy theory is employed to build a new buffer setting model that comprehensively considers overall complexity entropy,individual complexity entropy,construction difficulty entropy,resource constraint entropy,and decision-maker preference factor.The root variance method is adopted to improve the buffer calculation formula.Then,the redundant buffer is integrated into the project buffer,and the buffer setting model is modified by absorbing possible risks.Finally,an example is discussed to verify the practicability of the model.The research shows that the proposed model can quantify the impact of risk factors on project schedule more reasonably and comprehensively,improve the accuracy of buffer setting,and effectively solve the series of problems caused by excessive import buffer.