Delay analysis using learning effect and linear scheduling in construction

Delays occur commonly in construction projects. Assessing the impact of delay is a contentious issue, especially when there are productivity changes for the repetitive tasks. Learning curves have traditionally been used to describe the improvement in the performance of repetitive tasks. Several delay analysis methods are available for determining the schedule impact resulting from project delays and disruptions. But, no one method can be used in situations including the change of productivity for the repetitive tasks. In analyzing the delay, especially for the repetitive tasks, care should be taken if there are any productivity changes and learning effects. This paper proposes the πaccumulated delay analysis method ver.1 (ADAM ver.1)π to analyze the schedule delay. Included are lost productivity and learning effects that affect the results of the analysis.