Forecasting productivity by work sampling

The measurement of labour inputs to the productivity process is the major subject of this study. It is concerned with the simplification of the operation of collecting labour productivity information on site where it is not a one-time task and should be a continuous effort to acquire as many measurements as possible to ensure constant field management control of the project. The study employs the simple methods of work sampling and learning curves for field managément control to measure labour utilization during the construction process. Work sampling technique is a simple and easy technique to use in the management of site resources, time and labour, but it is only an indirect measurement of actual productivity. Therefore, the study has concentrated on demonstrating the correlation between the work sampling percentages, unit rate productivities, and the learning rates of global activities through the development of productivity projection models. Thus, it is possible to quantify productivity and learning rates directly through the simple technique of work sampling.