Purpose -This study aims to identify systematically the factors that can often influence labour productivity directly and indirectly, to build a model that can evaluate the significance of these factors. The model can be used as a tool for assisting field construction mangers responsible for productivity. Design/methodology/approach -The factors were first identified by undertaking a literature review. The scope and method for measuring labour productivity were then determined. The final analysis model was built through a statistical analysis conducted with the chosen factors. Findings -The results of the analysis indicate that the work management component (e.g. the manager's abilities) and the work technique component (e.g. work continuity) have greater impact than the worker component (e.g. the workers' capability) and the work characteristic component (e.g. work difficulty).Research limitations/implications -This research focuses on the qualitative perspective of site managers on labour productivity. Although the process of translating qualitative opinions into quantitative data is a matter for debate, the result of this research, when compared to other quantitative studies, can be used to establish a strategy and an action plan for managing labour productivity. Practical implications -Qualitative aspects that were considered to establish a labour productivity model can be evaluated by site construction managers. Despite the importance of these qualitative aspects, they have, by and large, been neglected, as models to date tend to consider more directly measurable quantitative factors. In particular, they can be used to develop a strategy for increasing labour productivity at the initial planning stage. Originality/value -This research explores the differences between a subjective perception and the objective reality of labour productivity.

Progress management is demanding because of the volume of information exchanged among the various parties involved in a project. In particular, steel structures for high-rise construction projects are among the major work items that require more intensive progress management. This research aims at developing a real-time progress management system through an automated module for scheduling estimates and using an RFID system for real-time construction progress. We propose a new technique that preconstruction engineers can use to build a schedule estimation using 3D-CAD and a Database. By using these tools, engineers can visualize then analyze real-time, actual construction progress with on-site RFID and robot systems. The realtime progress management system developed in this study maintains the continuity of the information from 3D design, the accuracy of lists of materials, the automation of expected progress, and the management of actual progress.