This case is an opportunity to apply the methods of the Toyota Production System (TPS) to the analysis of an everyday service application: administering Covid-19 vaccines. It describes the start-up of a drive-up Covid-19 mass vaccination site at the Texas State Fair Grounds on the east side of Dallas, Texas. The challenge facing Jamie Bonini and Bita Behgooy, the protagonists, is to help the Dallas County staff raise the vaccination output rate to 1000 cars per hour, but they also are not in charge so they have to influence the site leadership. This is the (B) case, which accompanies the (A) case.