The biggest problem with using the toilets in shopping malls in China is the lack of location and real-time information on occupancy, the status of toilets,the number of users, etc. Due to the large population, it’s common to see people queuing in front of toilets in shopping malls, resulting in time-wasting and uncomfortable feelings.

Even though many shopping malls have already been equipped with touch screens,the service to provide the location, configuration, occupancy, and congestion of toilets is hardly seen.

Research indicates that real-time data on toilet occupancy can significantly improve the visitor experience by reducing wait times. Understanding user behavior and preferences is crucial in designing an effective information system.

Implementing an Internet of Things (IoT)-based system to monitor and display real-time occupancy of toilets. This system is designed to be intuitive and accessible, leveraging Jakob Nielsen's principles of interaction design for maximum efficiency and user satisfaction. Meanwhile, the utilization of existing displays can be  higher.

The design solution includes a touch screen interface that provides real-time data on toilet occupancy, equipped with user-centric features such as occupancy indicators, wait time predictions, equippment offeres, and directions to the nearest available toilets.