This document discusses the importance of just-in-time operation for social games. It emphasizes blazing through the PDCA (plan-do-check-act) cycle on a daily basis by using user data to plan adjustments, implementing changes, checking results, and acting to begin the next cycle. Key aspects of operation include optimizing user stress levels, segmenting users, and running frequent in-game events to drive sales. Sales are broken down into key performance indicators like installations, retention rate, pay rate, and average revenue per paying user that must each be improved to increase overall revenue.