A project is not progressing as planned following the departure of the project manager.

An issue log is used to document and track problems that arise during a project, including unforeseen events like the departure of a project manager. It helps in recording the issue, assigning responsibility, and tracking the resolution process. This tool is essential for maintaining project continuity and ensuring that issues are addressed promptly.

Per the CompTIA Project+ PK0-005 exam objectives, under Domain 2.5: Given a scenario, perform issue management activities, maintaining an issue log is a key activity for tracking and managing project issues effectively.