Avaliação da usabilidade do Prazo+ utilizando o método System Usability Scale (SUS)

Abstract

This paper presents the usability evaluation of Prazo+, a system designed for managing product expiration in medium-sized retail grocery stores. The objective is to validate the tool’s effectiveness as an accessible solution for inventory control and food waste reduction, eliminating the need for high-cost infrastructure such as RFID. The methodology is based on the application of the System Usability Scale (SUS) in a practical case study, involving tests with store managers and floor operators. The approach combined quantitative data—to measure efficiency and ease-of-use metrics—with qualitative data, collected through open-ended questionnaires to gather user feedback. The results demonstrate high acceptance, with usability scores averaging above 4.30, highlighting significant operational efficiency gains (4.80). The analysis indicates that, beyond technical feasibility, the system optimizes the expiration control routine, requiring only minor interface adjustments to improve readability.