Issues in a construction project are discrepancies, problems or challenges that may arise during the course of the project. They include errors, defects or discrepancies within the BIM-model or other project-related data. These model-based annotations can affect various aspects such as design errors, clash detection, changes and adjustments, and quality control. Issue management is a crucial part of the BIM workflow, which includes identification, documentation, tracking and resolution to make construction projects more efficient and improve quality. Special software tools are often used to facilitate the exchange of information between project participants.