When encountering a bug in previously delivered functionality, what action should be taken?

When encountering a bug in previously delivered functionality, it's essential to evaluate the significance of the bug to determine the appropriate course of action. The correct approach is to fix the bug if it is deemed critical or to add it to the Product Backlog for future consideration. This balanced method allows the team to prioritize based on the impact of the bug on the current product's performance and user satisfaction.

By addressing only critical bugs immediately, the team can ensure that serious issues affecting the product’s functionality and user experience are resolved swiftly. This helps maintain a high standard of quality and ensures customer trust. On the other hand, non-critical bugs can be documented and added to the Product Backlog, allowing the team to prioritize their resolution in future sprints based on their significance and the feedback received from stakeholders.

This approach aligns with Agile principles, ensuring that the team remains responsive to change while also not overwhelming themselves with fixes that may not provide immediate value. It also fosters a continuous improvement mindset, as documenting bugs for later review helps in refining the product roadmap and making data-driven decisions in planning future iterations.