Factors affecting the productivity of reinforcement work labours in low-cost residential buildings

Abstract

It is important to identify the factors affecting labour productivity to enhance productivity. Although there have been many previous studies about the factors affecting productivity, there is a gap in identifying factors affecting the rebar workers. Therefore, the present study tries to bridge this gap. Thus, a questionnaire has been distributed to a group of consultants and contractors. There have been six groups: one associated with the rebar workers and five related to workers in general. 140 questionnaires have been received. SPSS program has been used to statistically analyse the data. In order to show the effect of different analytical methods on the ranking of the outputs, the analysis is done using two methods. The first method measures the effect after applying PMP matrix method, while the second method depends on the probability and the influence to validate the results of the first method. The results indicate that "project type" and "delayed payment" factors were the most important factors that have determined some factors that affect rebar labours. They further show that factors in the external group have a negative impact on and reduce productivity growth. Finally, the application of factors, influencing the productivity of the rebar’s labour, has led to a model where an equation is applied using some tests, namely reliability, factor analysis, and regression to assess the impact of the factors on the variation of labour productivity and measure productivity growth in a low-cost Residential building in a later work.