Final answer:
The best course of action for the Product Owner when developers cannot build everything forecasted during a Sprint is to re-negotiate the selected Product Backlog items with the Developers.
Step-by-step explanation:
When developers find out during the Sprint that they are not likely to build everything they forecast, the best course of action for the Product Owner would be to re-negotiate the selected Product Backlog items with the Developers. This allows the Product Owner and Developers to work together to prioritize the most important items and adjust the Sprint plan accordingly.
This step is important because it ensures that the limited time and resources available during the Sprint are focused on delivering the most value to the customer. By re-negotiating the selected Product Backlog items, the Product Owner can help the Developers achieve a realistic and achievable goal for the Sprint.
It is not recommended for the Product Owner to cancel the Sprint, change the Sprint Goal, or skip Product Backlog refinement activities without first discussing and re-negotiating with the Developers. Additionally, while informing management that more resources are needed may be necessary in some cases, it should not be the initial response when facing the challenge of not building everything forecasted.