## 1 Introduction  
The world has never evolved as fast as in the last couple of decades. To provide context, the global construction industry has been affected by the world's urban population rising by 200,000 people per day [1]. The demand for affordable housing has never been higher [2], affected by a concomitant need for social, utility, and transportation infrastructure. Such challenges have ensured that the construction industry continues to review and revamp itself. The changes that occur here impact on society as a whole--the construction costs will fall, and the environment will benefit. This is achieved by efficiently using scarce resources and/or ensuring that buildings are being constructedwith eco-efficiency in mind [3]. This positively impacts the economy by ensuring that the global infrastructure gap is narrowed, and economic development is boosted overall. During the last couple of decades, most industries have undergone an evolution and have instilled product and process innovations into the core of their operations. The engineering and construction sector has not kept pace in terms of technological opportunities that can help improve production and productivity, resulting in a stagnation of labor productivity as well [4]. Several internal and external challenges are responsible for this situation, including the industry dealing with consistent fragmentation, trouble recruiting a workforce with the right talent, insufficient links to contractors and suppliers, and inadequate transfer of knowledge from one project to another [5]. Despite the industry's vast potential, increasing efficacy and productivity can only result from digitalization, new techniques for construction, and innovations. Tools such as three-dimensional (3D) scanning, building information modelling (BIM), drones, and augmented reality have all reached market maturity [6]. By incorporating these innovations, firms can exploit them to increase productivity level, safety, and quality, and improve project management. To use this potential, a strategy must be devised for concerted and committed efforts across many different areas, including operations, technology, personnel, regulation, and more.  
The fourth industrial revolution 4.0 or Industry 4.0 has introduced digital technologies, sensor systems, intelligent machines, and smart materials to the construction industry where BIM has become the central repository for collating digital information about a project [5; 7]. BIM is an ideal stage for the development of powerful and innovative applications for the construction industry by providing an additional layer of data that are able to interact and collaborate in real time throughout the project life cycle [8]. The innovation of BIM manages computational data for improving construction efficiency and economy [9]. With open BIM, existing construction management tools can be integrated with BIM to extend its capabilities in the construction ecosystem [10]. BIM has been widely accepted in the construction industry [11] though not many firms have taken full advantage of its potential despite the investment in BIM being proven to be well worth the cost of implementation to organizations [12]. Therefore, we decided to examine the present status of BIM in the Industry 4.0 in the context of the construction industry to identify evidence on the integration of BIM with digital technologies such as intelligent machines, sensor systems, and smart materials. To achieve our goal, we conducted a bibliometric mapping study using a scoping review technique to discuss the current trend of Industry 4.0 in the construction industry to identify the patterns of existing research in the aforementioned context, identify gaps in the research, and provide suggestions for future research directions.