Improving Labour Productivity in Construction Site through Work Sampling

Labour productivity has a major impact on construction project is completed on time. Therefore, it is important for construction managers to improve the conditions that affect labour productivity on their jobsites. Work sampling is a method that evaluates the amount of productive, supportive and non-productive time spent by the workers engaged in performing their assigned work activities. It also helps identify any trends affecting labour productivity. A review of the literature is done to study about productivity improvement process and workface assessment methods. Activity analysis is a continuous productivity improvement process which efficiently measures the time expenditure of workers onsite and identifies productivity inhibitors that management must reduce or eliminate to provide workers with more time for direct-work activities. The steps involved in activity analysis process are plan study, sample, analyse, plan improvements, and implement improvements. Six case studies were conducted using activity analysis process for feasibility check. The results conclude that activity analysis process is feasible to be conducted in construction site and also significant improvement in direct work rates is obtained.