According to the PMBOK Guide, 6th edition, one of the key processes of the Project Quality Management knowledge area is Manage Quality, which involves identifying and resolving quality problems. One of the tools and techniques for this process is problem solving, which consists of defining the problem, identifying the root cause, generating and selecting alternatives, and implementing solutions. By requesting that the team identifies, documents, and registers the issues, the project manager is following a systematic approach to problem solving, which will help to prevent recurrence of the same or similar problems, and improve the quality of the project deliverables. References: PMBOK Guide, 6th edition, pages 286-287, 291.