# Smartwatch-Based Monitoring and Alert System for Factory Operators Using Public Cloud Services
## 2 Related Work  
Based on the information discussed, it is evident that factories require systems that facilitate the digitization of human-to-human interactions. These systems should enable real-time communication between employees through user-friendly mechanisms, particularly for operators directly engaged in production. They must also support the monitoring of tasks performed by employees, ensure efficient management of the data generated, and incorporate modern technologies that offer both scalability and reliability. The integration of mobile and wearable technologies in industrial production environments has become a significant focus in recent research. [PERSON] et al. [13] examine how human interventions can be co-designed with factory staff to develop mobile and wearable monitoring systems, emphasizing the importance of involving workers in the design process to ensure alignment between their needs and the technological requirements of smart factories. Similarly, [PERSON] et al. [14] conducted a field study on the user experience of manufacturing workers with mobile and wearable monitoring apps, highlighting challenges such as interface adaptability and the impact on workers' efficiency and comfort. Both studies contribute to understanding how wearable and mobile technologies can transform industrial processes by enhancing connectivity and optimizing workflows, while prioritizing a user-centered approach. The integration of cloud services into manufacturing processes represents another significant step in the evolution of Industry 4.0. As highlighted in [15], these bring a series of benefits, facilitating more efficient data management and improved scalability. The use of the cloud allows factories to store and process large amounts of data in a centralized, efficient manner, thereby reducing the need for bulky and costly physical servers [16]. In the context of improving employee communication through cloud services, factories benefit from the ability to access and analyze data in real time, which enhances decision-making and real-time connectivity to information. Additionally, cloud services offer a higher level of data security, which is essential in an industrial context, where information protection and compliance with data regulations are critical. Cloud service providers implement advanced security protocols and are responsible for updates and infrastructure maintenance, which minimizes the risk of exposure to cyber-attacks [17]. Thus, it can be observed that the use of the cloud allows for better management of software resources and can help information systems by providing the benefits of scalability, performance, and security. Currently, there are software systems on the market aimed at improving the workflow of factory employees through the use of smartwatches. Workerbase is one such system, designed to collect data and facilitate the exchange of information between employees via smartwatches [18]. Another example is Nivy, used for task and employee activity management [19], which also provides a hardware solution, offering a smartwatch specifically designed for its software. A final solution is SOL-X, which focuses on ensuring operator safety through notifications that may include messages from supervisors, alerts based on the operator's work area, or details related to the physical condition of the person wearing the watch [20]. Although these solutions provide a range of functionalities, each has its own set of limitations. Workerbase, for instance, centers primarily on communication between employees and the manufacturing process, offering limited support for human-to-human interaction. Nivy, while providing a dedicated hardware solution, can restrict flexibility in terms of equipment expansion or replacement and may entail significant financial costs for factories seeking to implement it. Additionally, Nivy focuses more on task management rather than offering a comprehensive range of contextual notifications and alerts.