Agile methods offer many powerful agile system development practices and have received considerable attention from industry. Agile system development is a mindset that has their foundation on agile values and principles. The adoption and then ongoing management of an agile system development environment is not an easy task and may pose several challenges. Organizations, especially on the large-scale, require a systematic support for adopting and managing agile methods in their complex system development settings. Agile software solution framework (ASSF) is a comprehensive empirical framework for iteratively harvesting and managing the agile culture at both team and large enterprise level or organization-wide. This book presents ASSF details for leaders, agile coaches, managers, consultants and teams responsible for the deployment and improvement of agile methods in their complex system development environments.