In Safety Culture: Building and Sustaining a Cultural Change in Aviation and Healthcare, the four authors draw upon their extensive teaching, research and field experience from multiple industries to describe the dynamic nature of a culture-change process, particularly in safety-critical domains. They use a "stories to numbers" approach that starts with felt experiences and stories of certain change programs that they have documented, then proceed to describe the use of key measurement tools that can be used to analyze the state of a change program. The book concludes with a description of empirical models that illustrate the dynamic nature of change programs. The Purpose-Alignment-Control (PAC) Model is used as the overarching theoretical construct to analyze the interactions between key variables and their individual as well as collective impacts on the overall change in culture. By understanding and applying the PAC Model, change-program managers will be able to fully understand the typical lifecycle of a change program and prepare themselves to manage both the qualitative aspects associated with human experiences as well as the quantitative aspects of corporate and legal justification. This book will be particularly helpful to academic faculty, management students, and organizational consultants.