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Site layout planning is a critical factor for the successful execution of any construction project. As cities develop, site logistics becomes an essential planning aspect for any construction project. Project sites in tight neighbourhoods lead to not just space constraints but also challenges to approach, material handling, and pollution control. Site layout planning has been in practice in the industry, however, limited to a traditional approach of a pre-construction assignment, rather than a dynamic system to analyse construction sites in terms of both space and time. Material handling and delays related to waiting for materials add to a considerable amount of waste during the execution of projects. The paper here explores minimisation of wastes on construction sites, as defined by Lean Construction, using a BIM model highlighting the construction site layout planning to visualise the various aspects of space constraints, access routes, safety considerations, and a visual approach to progress monitoring and reporting. The research follows a case study analysis to develop an understanding of the present scenario, based on which a proposed scenario has been developed to elaborate on the improvements. The paper concludes with a summary of wastes observed and minimised, along with benefits observed through BIM implementation.

Building Information Modeling (BIM) and Lean construction principles have been used independently as significant methods to construction process improvement. Their combination presents challenges and opportunities in implementation, especially when applied in the field.This study explores two perspectives, firstly identifying factors and issues in design coordination of construction projects; secondly, applying lean and BIM functions simultaneously to overcome some of the problems in design coordination. Relative Importance Index (RII) method was adopted to identify major critical factors of design coordination and their effect on the three categories viz; design management, time management and cost management. Subsequently, BIM and lean functions such as 4D simulation integrated with Look ahead planning, Quantity take off, Clash detection during look-ahead and weekly work planning, to reduce change orders and RFIs for additional value to customer were applied in an integrated fashion. This improvised BIMLean process facilitates the design co-ordination during construction phase for all project stakeholders. Finally a matrix is drafted based on previous research that shows integration of Lean Principles and BIM functionalities adopted for the case study.

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