Abstract:
Productivity rating method can be used to evaluate productivity on construction site by
classifying works in three categories. They are effective work, essential contributory work, and
ineffective work. Labour Utilisation Factor (LUF) is used as a mean to evaluate construction
productivity. However, different construction activities have different productivity as a result of
theirs nature, difficulty, and contributory activity.
In this research, a case study of a three storey building with a project cost of 17 million
Baht is presented. The productivity rating method reveal that one activity has the LUF lower than
45.05 %. By using a Crew Balance Chart, productivity of that activity is increased 8.63 %. The
productivity of the other two activities which have the ineffective work rate greater than 31.45 %
are improved for 7.72 % and 8.48 % by adjusting crew size and work processes. This research
presents guidelines in performing productivity rating, improving productivity, and calculating
LUF step by step. Contractors can compare theirs results with the LUFs and follow guidelines
presented in this thesis for improving construction productivity.