Decision-making is a process of choosing from possible courses of action in order to attain goals and objectives. Nobel laureate Herbert Simon wrote that the whole process of managerial decision-making is synonymous with the practice of management. Decision-making is at the core of all managerial functions. Planning, for example, involves the following decisions: what should be done? When? How? Where? By whom? Other managerial functions, such as organizing, implementing and controlling, rely heavily on decision-making. Decision by Objectives is a book about the art and science of decision-making. It presents a very practical approach to decision-making that has a sound theoretical foundation, known as the analytic hierarchy process. Intended for both the student and the professional, the book includes approaches to prioritizing, evaluating alternative courses of action, forecasting, and allocating resources. By focusing on objectives rather than alternatives alone, it shows the reader how to synthesize information from multiple sources, analyses, and perspectives. The methods presented have been gaining popularity throughout the world.