Planning is key, frequently involving highly complex and multidisciplinary problems. To deliver viable solutions for such challenges is often the task of architecture, urban and regional development planning, as well as of politics and of a wide array of organizations, such as companies or administrative authorities. This book provides a resource for this. It presents a methodology for developing targeted, systematic and action-oriented solutions that focus on specific problems. This process generates insights that go beyond the boundaries of different disciplines, with conflicts of interest and of values integrated into the solution process. Being clear about what to tackle and what to watch out for enables the solving of complex problems. This book is aimed at architects, urban and regional planners, as well as managers and politicians, for they are all continuously faced with the task of having to deal with complex and multidisciplinary problems, for which routine solutions are ineffective and which require the systematic approach to problem solving presented in this handbook.