Modular construction uses building modules manufactured inside the controlled environment of factories to be transported and assembled on site. Modular construction can be considered as a hybrid of manufacturing and construction, and in many ways lends itself to lean production. Lean production, originating in the automotive industry, permits significant improvements in terms of productivity and quality. The latest challenge of lean production is its implementation in the modular building industry, where the full potential in terms of productivity is yet to be achieved. The paper discusses the implementation of lean techniques in the modular building industry, including all the production process stages (i.e., design, manufacturing, transportation, assembly on site, and supply chain) through a systematic review. Moreover, the paper provides a chronological and comprehensive review of lean methodologies and tools in manufacturing and traditional construction industries to further investigate the interface of lean and modular construction. This may assist practitioners with an overview of lean strategies and associated potential benefits and obstacles for future case studies.

Building information modeling (BIM) has emerged as a pervasive and ubiquitous tool in the fields of construction and engineering. With BIM’s rise, so too has there been an explosion of research interest in BIM. Nevertheless, despite the prolific output of BIM-related publications, the cumulative theoretical and practical value of this body of research remains vague; alignment with current industry objectives and relevance to future global challenges remain unclear. This study systematically analyzes the current body of knowledge so far produced on BIM through a purely quantitative approach. Network analysis techniques are used to assess the status of research themes, cross-topic research, trends in topic concentration, and influence of outlets, as well as to map how research actors collaborate in creating knowledge on BIM. The results reveal that although 45 separate themes are closely associated with BIM literature, a further 15 relevant themes have been neglected. Moreover, much of the research is revealed to be increasingly self-referential, lacking in cross-disciplinary insights, and weak in theoretical rigor. This study contributes to the field generally, and to editorial boards of research journals in particular, by identifying the intellectual deficiencies in BIM research and skewed distribution of research output across BIM related topics, as well as priorities for future research in BIM.