Identification and Reduction of the Manpower Waste in Construction Using Work-Sampling Analysis

Delays in a construction project are directly dependent on the extent of activities performed by the workers on the site daily that do not add value to the project deliverables. To address the time and cost overruns of a project due to these, workers must be closely observed to categorize their activities. An efficient observation-based lean tool that can be used for this is work-sampling analysis. This study aims to assess the use of tour and crew-based work sampling to determine the level of manpower waste in the ongoing construction site of a commercial 3B + G + 10 high-rise building in Bangalore, India. The aim also extends further to data analysis from the obtained video samples to determine the root causes of manpower waste in the project and corresponding strategies that were undertaken to eliminate the same. The study also discusses the extent of improvement in the project execution methodology after the root causes from the work-sampling analysis has been adequately addressed.