This US Government Accountability Office guidebook, GAO Best Practices: Agile Assessment Guide: Best Practices for Agile Adoption and Implementation NOV 2023, focuses on best practices surrounding Agile adoption, execution, and controls. For example, chapter 3 groups commonly recognized best practices for Agile adoption into the areas of team dynamics and activities, program operations, and organization environment. Chapter 4 provides an overview of high-level program management concepts surrounding Agile execution and control best practices, such as requirements development and management, acquisition strategies, and program monitoring and control. Agile execution best practices related to requirements development and management and the federal contracting process are discussed in more detail in chapters 5 and 6, respectively. Program control and monitoring best practices for cost estimating, scheduling, and earned value management are discussed in chapter 7, and best practices for metrics that can be used during the adoption, execution, and monitoring and control periods of the program are discussed in chapter 8. Certain concepts in the chapters are further explained in the appendixes. Definitions of the key terms and processes discussed throughout this guide are explained in appendix II. Related terms and their comparison to terms with similar meanings from different methodologies are described in appendix III.