The product team is progressing with a prototyping approach to deliver a multiyear business initiative. A few user stories are taking longer to be delivered. What should the project manager do?

In an agile environment, retrospectives are key meetings held at the end of a sprint or iteration to inspect the team's process and identify improvements. When user stories are delayed, it indicates potential risks or process inefficiencies, making the retrospective the appropriate forum to analyze these issues, determine root causes (risks), and formulate solutions as a team.

While informing stakeholders is part of good communication, it does not address the root cause of the delay or propose a solution; it's a reactive communication step, not a proactive problem-solving one.

This assumes the issue is solely a communication problem, which is not directly indicated by user stories taking longer, and addressing communication gaps wouldn't inherently resolve the underlying delivery delay.

While identifying cross-dependencies and planning a spike can be valid agile activities, the immediate action for *existing* delays on *already in progress* user stories is to understand why they are delayed and how to resolve them, which aligns better with a retrospective than immediately planning a spike without understanding the current problem.