  Artificial Intelligence is becoming part of any technology we use nowadays.
If the AI informs people's decisions, the explanation about AI's outcomes,
results, and behavior becomes a necessary capability. However, the discussion
of XAI features with various stakeholders is not a trivial task. Most of the
available frameworks and methods for XAI focus on data scientists and ML
developers as users. Our research is about XAI for end-users of AI systems. We
argue that we need to discuss XAI early in the AI-system design process and
with all stakeholders. In this work, we aimed at investigating how to
operationalize the discussion about XAI scenarios and opportunities among
designers and developers of AI and its end-users. We took the Signifying
Message as our conceptual tool to structure and discuss XAI scenarios. We
experiment with its use for the discussion of a healthcare AI-System.
