An agile team delivers a product that must be certified by another expert team, but that second team delays taking the deliverable for many months. What should the servant leader do?

The servant leader's primary role is to remove impediments that hinder the team's progress. In this scenario, the delay from the certification team is a significant impediment. Reviewing the process allows the servant leader to understand the root cause of the delay and then take action to remove it, such as facilitating communication, streamlining the handoff, or negotiating a new process. Removing the certification requirement is not an option as it's a project necessity. Escalating to the project director is premature; the servant leader should first attempt to resolve the issue directly. Escalating to the agile lead of the second team might be a step in removing the impediment, but it's part of the broader process review and impediment removal, not the complete solution itself.