Measurement of productivity rate of drainage trench excavation using lean strategy

Abstract

Productivity in construction industry is the ratio of output over resources that determine the outcome of product. LEAN is the principle used by the manufacturing industry to improve their product. This research apply the measuring productivity principle used by the manufacturing industry on machinery to measure the productivity of drainage civil construction activity. Hence, it aims to evaluate the quality of the constructed drainage base on the measured productivity outcomes. In this study, Time Cycle analysis is used to measure the productivity of a backhoe machine used for trench excavation and the labour productivity rate to install the drainage is also measured. Additionally, Cycle Time Tracking & Variance Analysis model are use to analyse the data obtained. The research targets a construction of drainage around Johor Bharu as a case study. The significant of study is to measure the optimum productivity rate of drainage construction. The optimum productivity rate for excavation is 3.59meters per hour with the quality of 4.2 out of 5, while the productivity rate to install the culvert is 8 pieces per hour with the highest quality of 4 out of 5. Productivity measurement can improve the overall construction performance in the construction.