Aircrew management across the Total Air Force is complex and would benefit from greater coordination among the active and reserve components. To affect that coordination, the U.S. Air Force established a Total Force Aircrew Management (TFAM) office. Reliable and consistent projections of requirements and inventories are critical to such coordination. To assist in making these projections, RAND Project AIR FORCE developed a modeling capability, the Total Force Blue Line (TFBL), that projects rated inventories for the Regular Air Force, Air Force Reserve, and Air National Guard. The model has been delivered to the TFAM office, and this document provides the information necessary for Air Force personnel to use the model. The research reported here was commissioned by the Air Force Director of Operations Training and Readiness (AF/A3T) and conducted within the Workforce, Development, and Health Program of RAND Project AIR FORCE as part of a fiscal year 2021 project, “Aircrew Task Force and Total Force Aircrew Management Analytics and Web-Based Models/Tools.” Information for Aircrew Managers This user’s guide is for those who use the TFBL model. The organization of this guide is as follows: Chapter 1 describes the nature of the pilot management problem, the analytic capabilities the Air Force has to cope with it, and how the TFBL model helps the Air Force manage all rated personnel. It also provides a high-level model description. Chapter 2 generally describes the input data and uploading of the input data files into the web app. Chapters 3 through 6 explain how to generate more-complex data; solve the model; visually display the outputs, including the red-line/blue-line (RL/BL) charts; and download the model results. The appendix provides details for the model inputs and formats for the input files.