A Three Methods Proactive Improvement Model for Buildings Construction Processes

Abstract

This paper proposes a proactive model to improve the overall performance of constructionprocesses. The main advantage is that potential waste and associate impacts could be identified in theearly stages of a project before the construction phase. To accomplish that, the model combines threemethods; Lean-to identify waste, Green to assess environmental impact, and Six-Sigma to measureand improve process performance (LG6). The LG6 model helps in evaluating processes one step ata time, identifying consumed resources, analyzing the environmental performance of all steps aswell as highlighting generated impacts, applying improving alternatives if needed, and measuringprocess performance for evaluation. The functionality of LG6 is illustrated through a case study ofwoodpiles installation. In this case study, the LG6 model identified four steps out of eight that areconsidered potential waste or (non-value-added steps) according to the Lean principles. As a result,the LG6 model helped in reducing impact by 9% and expenses by 1%. The LG6 model can help toimprove the performance of construction processes and reduces unnecessary waste.