Assessing the Impact of the Lead/Lag Times on the Project Duration Estimates in Highway Construction
作者机构：Department of Civil EngineeringUniversity of Texas Rio Grande ValleyEdinburgTX78539the U.S. School of Mathematical&Statistical SciencesUniversity of Texas Rio Grande ValleyEdinburgTX78539the U.S.
出 版 物：《Journal of Architectural Environment & Structural Engineering Research》 (建筑环境与结构工程研究（英文）)
年 卷 期：2021年第4卷第3期
页 面：47-62页
学科分类：0202[经济学-应用经济学] 02[经济学] 020205[经济学-产业经济学]
主 题：Scheduling Highway projects Lead Lag Time sensitivity measures
摘 要：The literature mentions multiple factors that can affect the accuracy of estimating the project duration in highway construction,such as weather,location,and soil ***,there are other factors that have not been explored,yet they can have significant impact on the accuracy of the project time ***,TxDOT raised a concern regarding the importance of the proper estimating of the lead/lag times in project *** lead/lag times are often determined based on the engineer’s ***,inaccurate estimates of the lead/lag time can result in unrealistic project *** order to investigate this claim,the study utilizes four time sensitivity measures(TSM),namely the Criticality Index(CI),Significance Index(SI),Cruciality Index(CRI),and the Schedule Sensitivity Index(SSI)to statistically analyze and draw conclusions regarding the impact of the lead/lag time estimates on the total duration in highway *** Excel-based scheduling software was developed with Monte Carlo simulation capabilities to calculate these *** results from this paper show that the variability of some lead/lag times can significantly impact the accuracy of the estimated total project *** was concluded that the current practices used for estimating the lead/lag times are *** such,it is recommended to utilize more robust methods,such as the time sensitivity measures,to accurately estimate the lead/lad times in the projects scheduled.
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