The acceleration of economic development, demographic growth, and the needs of the population have a particular impact on all fields of activity, including the construction industry. Among them, the sector of modular construction faces continuous transformations, based on innovation, in order to meet the increasingly sophisticated requirements regarding the efficiency, effectiveness, and sustainability of all stages of production and sales. Recently, the digital transformation in this sector, e.g. the adoption of BIM technology (building informational modeling) is considered promising from the perspective of improving performance. Also, efficiency can be increased by adopting Lean principles. Moreover, the synergy between BIM and Lean improves the overall management of a modular construction project and provides higher productivity and cost-effectiveness. This paper aims to identify the relationship between Lean and BIM drivers that can generate improvement in the production system. By using the Fuzzy DEMATEL method the paper explores the factors that generate the potential increase of the efficiency in modular construction industry. The study has significant practical implications for the analysis of the causes and effects of the integration of both technologies in the production of modular constructions.