# Augmented Reality's Impact in Industry--A Scoping Review
## 4 Discussion
### RQ5--What Are the Purposes of the Projects Developed Within Industry X.0?  
As shown in Section 3.5, most applications aim to visualize digital representations of objects or superimposed relevant information to assist the target sector. Specifically, the visualization of digital twins is being used in the field of smart manufacturing [94]. Another common purpose in AR application development is to support low-skilled operators in maintenance procedures [45]. Additionally, AR applications are used in production and assembly, improving efficiency and accuracy on production lines [49]. These three categories of applications (visualization, maintenance, and production) include studies specializing in interactive and/or collaborative purposes [76].  
Applications specializing in interaction allow users to dynamically manipulate digital content, enhancing comprehension of the task or item displayed. Conversely, collaborative applications facilitate interaction and communication between various real-world entities to streamline task execution, which is crucial in complex industrial environments [95]. Some studies focus on maintenance or assembly but include a specialized assistance component. These applications aim to provide workers with real-time guidance and support, reducing the likelihood of errors and improving task efficiency [96].  
Educational and training applications also hold significant influence, offering immersive learning experiences that bridge the gap between theoretical knowledge and practical skills through virtual experiences [97]. Though less prevalent, other types of AR applications also contribute valuable solutions. Product design applications aid in customization processes according to client needs, adding value to the industrial sector [98]. Furthermore, applications focused on simulation or process monitoring enable better control and prediction of industrial processes, reducing costs associated with real-world simulations by leveraging virtual environments [56].  
Despite having lower prominence, applications aimed at generating annotations in industrial processes [99] or tracking environments [50] are also notable in this review. Annotation-generation applications overlay digital information on real elements, facilitating note-taking, instructions, or labeling in relevant environments for specialized industrial use. Lastly, AR applications for object tracking use real-time object recognition to monitor the status of items, highlighting their role in maintaining operational oversight [68].  
The purposes of AR applications reflect the transition from the efficiency-driven focus of Industry 4.0 to the human-centric priorities of Industry 5.0. Interactive and collaborative applications, such as those supporting real-time guidance in maintenance or assembly, directly reflect the Industry 5.0 emphasis on enhancing worker engagement and adaptability [16; 95]. Additionally, product-design applications align closely with the principle of personalization in Industry 5.0 [16; 98]. The relationship between application purposes and hardware also underscores the role of Industry 5.0: the preference for smart glasses in hands-free tasks and mobile devices for accessibility creates industrial ecosystems that balance operational excellence with human well-being [100].  
It is worth noting the relationship between the purpose of the application and the hardware used for its execution. For purposes involving manual labor assistance (such as production and assembly), there is a clear dominance in the use of smartglasses for executing the developed services. This preference is due to the hands-free capability offered by this hardware, which is crucial for obtaining assistance through these solutions without limiting movements [100]. Additionally, the development for mobile devices must also be taken into consideration, as they represent the most versatile and generally more affordable option for users to acquire [101].