Economic analysis of industrial projects is based on methods which are often simple, sometimes complex, yet always to be applied with rigor.The aim of this book is to help readers assimilate the concepts and methods for investment decision and project evaluation. It offers a wide range of exercises, problems and case studies taken from business, which are the fruit of many years of teaching, consulting and research. Some are direct application of basics, others require a higher degree of reflection for more complex applications. Our approach borrows elements from microeconomics, engineering economics and finance theory. While many examples relate to the energy sector, particularly oil and gas, the problems addressed are of broader scope and so are fully applicable to other industry sectors. This book is ideally suited to both professionals and students who seek to master capital budgeting techniques. A review of essential points is proposed at the beginning of each chapter and key methodological elements are recalled in the solutions