Design de mecanismos de ajuda no sistema usinn modeler para aprimorar a experiência do usuário

Abstract

Usability is a key factor in the development of interactive systems, directly influencing user efficiency and satisfaction. USINN Modeler is a tool designed to support interaction and navigation modeling in interactive systems, using the USINN (USability-oriented INteraction and Navigation Model) notation. It aims to integrate the representation of interaction and navigation aspects, considering applicable usability mechanisms even in the design phase. However, studies indicate that professionals with little experience face difficulties in adopting the notation and using the tool, impacting its acceptance and applicability. This work aims to propose and evaluate help mechanisms in USINN Modeler to improve the user experience, making the tool more intuitive and accessible. The methodology adopted included a literature review on usability, interaction modeling, and interactive documentation, as well as an analysis of user barriers to the notation and the system. Based on these findings, prototypes of help mechanisms were developed—such as contextual tutorials, preconfigured diagram templates, and the integration of USINN Cards—informational letters with concepts, examples, and modeling guidelines. These mechanisms were incorporated into the tool's interface and evaluated through usability testing with novice users using the DECIDE framework and the TAM (Technology Acceptance Model). The TAM model was adopted because it allows for the assessment of technological acceptance of the help mechanisms implemented in USINN Modeler, directly aligning with the objective of understanding user perceptions of the tool's usefulness and ease of use. The DECIDE framework was used to guide all stages of the planning, execution, and analysis of the usability tests, ensuring that the methodological design was aligned with the central objective of verifying the mechanisms' effectiveness in improving the user experience and notation learning. The results demonstrate that the implemented mechanisms, especially the explanatory pop-ups and pre-built models, significantly contributed to notation understanding and facilitated task execution. The research highlights that the combination of interactive features and contextual support is an effective strategy for reducing barriers to USINN Modeler adoption and e