Case study of delay impact analysis of lost productivity in construction projects

Schedule delays commonly appear in construction projects and result in delay claim progressively. Several studies have proposed various schedule delay analysis methodologies; however, most of the studies focus on the analysis of surface data (as-planned and as-built schedules), few of them on evaluating the effects of root causes, such as the problem of lost productivity. Lost productivity, one essential delay cause, is usually experienced by a contractor while accomplishing its works less than planned rate of production. For analyzing the situations of schedule impacts caused by lost productivity, this study discusses a case of delay analysis with lost productivity in Laiwan. Lhrough the study case, this study has proposed an approach to calculate schedule impact from lost productivity. Lhe study results will be a basis for developing a comprehensive delay analysis method considering lost productivity.