How often should the Scrum team inspect their work processes?

The Scrum team should inspect their work processes during every Sprint Retrospective because this event is specifically designed for the purpose of reflection and improvement. The retrospective occurs at the end of each sprint, providing an opportunity for the team to evaluate what went well, what didn't, and how they can improve their practices in the next sprint.

This consistent and regular inspection allows the team to address challenges and adapt their processes iteratively, fostering a culture of continuous improvement. By doing so after each sprint, the team can make adjustments more dynamically, rather than waiting until the end of a project or only meeting periodically. This proactive approach enables Scrum teams to remain flexible and responsive to changing circumstances and team dynamics, ultimately leading to increased efficiency and effectiveness in their work.

The other options do not provide the same level of opportunity for consistent improvement; one suggests waiting until the end of a project, which would hinder timely adjustments, another proposes monthly assessments which are infrequent considering the nature of Scrum, and the final option implies a reactive rather than proactive approach to process improvement.