BARRIERS OF SUSTAINABLE LEAN CONSTRUCTION IMPLEMENTATION: HIERARCHICAL MODEL.

Adaptation of Lean construction ensures the likelihood of success and achieves the project objectives. Identifying the barriers of lean construction implementation is one effective way for adaption of lean construction implementation. These barriers vary in different countries based on, environment, culture, and other related factors. Despite the importance of identifying the barriers for successful adaptation and lean construction implementation, there are inadequate research studies that cover and classify all important barriers in social, economic and environmental aspects. Therefore, the objective of this paper is to identify and classify all significant barriers to a sustainable lean construction implementation through an extensive literature review. A semi-structured format of Delphi interview was conducted to verify all the classified and identified barriers. As a final point, this paper proposes a hierarchical model for the important barriers of lean construction implementation which could aid the decision and policy makers in selecting the best strategy on how to deal with these challenges.