Cards on a wall photograph well. Auditors recognize them. Teams feel they have “started Lean.” Meanwhile the bottleneck is a specialist with no deputy, or a walk that is seven minutes, or a Friday dispatch spike that no card quantity can absorb because the quantity was set on monthly averages.
We ask cohorts to wait. Not forever — Inventory Rhythm Clinic will size cover in hours — but until a stall log has clock times. Kanban without an owner is a moving pile. The card travels; the decision does not.
If you already have cards, do not rip them down as theatre in the other direction. Walk the loop with a stopwatch. Ask who is allowed to freeze a card. If the answer is “the system,” you have software, not a pull system. Software can help later. It cannot name a deputy.
Print cards after the unowned hour is named. The wall will look less impressive on day one and more honest on day thirty.