The Whiteboard Flow at Sony Tokyo, 1988

In 1988, the main conference room at Sony Tokyo filled with forty sticky notes and a dozen clashing memos each morning, but the real cost went unnoticed until Friday reviews showed nearly ten hours lost in misunderstandings every week. Sony managers switched to a single wall-sized whiteboard divided into three columns: To Do, Doing, and Done. Every task received a physical card, updated in real time-no new apps, just markers and magnets. Each team member moved their card as progress happened, keeping everything visible at a glance. By the end of the first month, Sony tracked those lost hours down to two per week, reclaiming eight every cycle with one change to the wall.