Book excerpt: This book is most suitable for aspiring and practicing project managers keen to benefit from real projects lessons learned, coupled with preparation for PMP or Prince II exams. Akin to those in PMO and program level managers and directors and management level who often play the stakeholders roles in the projects in the organization and interested to accelerate the success rates of project investment using lessons learned. This book dives deep into true scenarios in appreciating project business value, project financing decisions and looking at projects as investments tool by using certain mathematical formula and analysis methodology in achieving earned value management or arriving at decision point of continue or terminate projects. This book looks deep into compilation of bonus tips on applying PMP formula and principles into using soft and hard skills through easy-to-read and user-friendly diagrams. In the end, a PMP or Prince II or ITIL qualification is simply not enough without real field experience. Therefore, lessons learned and learning from last things first would be of great help here.