This book is designed for all those who are involved in the decision to invest in information systems. This book is especially relevant to senior business executives, senior financial managers and IT executives. A business case is a statement or a series of statements that demonstrate the economic value of a particular intervention, a course of action or a specific investment. A business case is not simply a financial forecast of the hardware and software costs and the expected benefits. A business case for an information systems investment involves a comprehensive understanding of both the likely resources as well as the business drivers which will assist business managers improve their performance and thereby obtain a stream of benefits from the investment.