Statistics on accidents in confined spaces reveal that many workers are injured and killed each year while working in confined spaces. The main cause of accidents and fatalities due to work in confined spaces is related to the lack of awareness about the presence and the risks of such unconventional workplaces. A confined space hazard assessment and risk control program should be implemented prior to access a confined space, aiming to control the risks associated with working in a confined space. This paper introduces a structured procedure and a digital tool for mobile devices, which aim to increase workers’ awareness about the risks of working in confined spaces.

The proposed tool investigates four different categories of confinement that characterize confined spaces: geometry, access, internal configuration, and atmosphere. After completing the procedure on the mobile application, the user, e.g. the employer or the company's safety professional, receives a list of potential issues that should be addressed before entering the space. Three case studies show the application of the proposed methodology to three suspected confined spaces.

密闭空间事故统计数据显示，每年有许多工人在密闭空间工作时受伤和死亡。在密闭空间工作导致事故和死亡的主要原因与缺乏对此类非传统工作场所的存在和风险的认识有关。在进入密闭空间之前，应实施密闭空间危害评估和风险控制计划，旨在控制与在密闭空间工作相关的风险。本文介绍了用于移动设备的结构化程序和数字工具，旨在提高工人对在密闭空间工作的风险的认识。

所提出的工具研究了表征受限空间的四种不同类型的限制：几何、通道、内部配置和大气。在移动应用程序上完成程序后，用户（例如雇主或公司的安全专业人员）会收到一份在进入该空间之前应解决的潜在问题列表。三个案例研究显示了将建议的方法应用于三个可疑的密闭空间。