This assignment is a student's portfolio for the PPMP20012 unit, focusing on the relevance of systems thinking to project, program, and portfolio management. The portfolio examines the fundamental objectives of systems thinking, systems engineering, and the differences between project, program, and portfolio management. It uses mandatory readings like SEBoK and Kerzner (2013) to explore these concepts. The assignment reflects on the readings and learning outcomes, and also analyzes real-world case studies, including the Deepwater Horizon and Texas City disasters, to illustrate the challenges organizations face when systems thinking and systems engineering are not properly implemented. The student reflects on the readings and their insights, providing a comprehensive understanding of how systems thinking can be applied to solve project problems and improve organizational performance. The assignment also discusses systems thinking tools and techniques, such as brainstorming, and how these can be used by project managers.