Lean construction is a highly effective managerial approach aimed at improving productivity within the construction industry. Extensive research has been conducted in recent years, with ongoing efforts to apply lean principles derived from the manufacturing sector to construction practises. The introduction of lean construction as a noble management tool aims to enhance efficiency and minimise waste. However, the implementation of lean concepts in the Indian construction industry faces numerous challenges. Limited attention and a lack of familiarity with lean management principles among stakeholders such as builders, contractors, engineering firms, and project management entities hinder the widespread adoption of these principles in a construction project. This study focuses on identifying the primary obstacles to implementing lean techniques in the Indian construction industry through a comprehensive questionnaire survey and on-site practical implementations to develop a process map for ongoing projects. Survey results indicate that certain lean techniques require greater emphasis to optimise processes. The framework analysis reveals that Nonvalue-added (NVA) and Essential Non-value-added (ENVA) activities exert the most significant impact on project duration. Consequently, the proposed implementation of lean techniques successfully improves the efficiency of NVA and ENVA activities, resulting in substantial reductions in their durations