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Incorporating Lost Productivity Calculation into Delay Analysis for Construction Projects
Jyh-Bin Yang,Kuei-Mei Huang,Chang-Hung Lee,Chui-Te Chiu 대한토목학회 2014 KSCE JOURNAL OF CIVIL ENGINEERING Vol.18 No.2
Schedule delays commonly occur in construction projects and often result in delay claims. Several studies have proposed differentschedule delay analysis methodologies. By using as-planned and as-built schedules, most previous studies have concentrated oncalculating the impact of identified delay events on project duration but have neglected to connect impact calculation from detaileddelay evidence in their analyses. Lost productivity, which is a primary cause of schedule delays, entails the completion of work at lessthan the planned rate of production; it is usually experienced by contractors. To solve analysis problem of schedule delays associatedwith lost productivity, this study proposes a delay analysis method (the LOPE method) that integrates a lost productivity calculationapproach and a well-known schedule delay analysis method, the collapsed as-built method. As demonstrated through a simplified case study, the proposed method is beneficial for calculating the impacts of schedule delays caused by lost productivity.