<![CDATA[The study employed an Agile-based system development approach supported by Unified Modeling Language (UML). Functional validation was conducted using black-box testing to ensure system conformity with user requirements. Usability evaluation was performed using the System Usability Scale (SUS) after the system had been used operationally for three months by 25 respondents representing various user roles. Parental engagement was measured using an adapted instrument contextualized to the use of a daycare information system. The results showed that the system achieved a SUS score of 82, which falls into the Good and acceptable category, while the mean parental engagement score reached 4.37, indicating a high level of engagement. These findings suggest that the system provides a good level of usability and is capable of supporting active parental participation in monitoring children’s development. The scientific contribution of this study lies in providing an integrated evaluation framework that combines Agile-based development, standardized usability measurement, and user engagement analysis within a real operational context. This study extends usability research beyond technical interface evaluation toward understanding user engagement within digital information service systems.]]>
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