Loss in Productivity in Relation with Delay Analysis in Building Construction Projects

Schedule delays commonly occur in construction projects and often result in delay and low productivity. Several studies have proposed different schedule delay analysis methodologies. By using asplanned and as-built schedules most studies have concentrated on calculating and identifying the delay events on project but have neglected the low productivity. Loss in productivity, which is a primary cause of schedule delays, entails the completion of work at less than the planned rate of production; it is usually experienced by contractors. To solve analysis problem of schedule delays associated with loss in productivity. This study proposes a delay analysis that integrates a loss in productivity by window analysis method which primarily calculates the schedule variance between the as-planned and as-built schedules to identify the schedule impact and loss in productivity.