Virginia Mason gave all staff the power to stop unsafe care

By the early 2000s, Virginia Mason Medical Center in Seattle faced the same problem every hospital does: care delivered in batches through a multi-step process, with errors surfacing only after they had already reached a patient, and no standardized channel for a nurse or support staffer who spotted a dangerous situation to halt the process without going through a slow, hierarchical chain of command that discouraged reporting from junior staff.

CEO Gary Kaplan and colleagues, after studying Toyota's manufacturing plants directly, began adapting the Toyota Production System into what they called the Virginia Mason Production System starting around 2002, including Toyota's andon cord — the mechanism that lets any assembly-line worker stop production the moment they spot a defect, without waiting for a supervisor's permission.

Virginia Mason implemented a Patient Safety Alert (PSA) system modeled directly on Toyota's andon/stop-the-line concept: any employee who encountered a situation likely to harm a patient was required to make an immediate report and cease any activity that could cause further harm, regardless of their role or seniority.

Gave every employee authority to stop unsafe care, importing Toyota's andon cord so the people closest to a problem could halt it before harm.

Authority to halt was extended to everyone, so those closest to a problem could act immediately.

Nurses and support staff, who previously had no protected channel, now reported most alerts.

Trust grew as staff saw reports acted on, increasing monthly reports from 3 to 285.

The mechanism worked because it removed the hierarchical bottleneck that discouraged reporting.

Give frontline workers formal authority to halt a process when they spot danger, not just a reporting channel, to unlock early intervention.

By December 2006, the hospital had logged 6,112 total PSA reports, with monthly reports climbing from 3 in 2002 to 285 in 2006 as staff trust in the system grew; reports came from across the hierarchy — 44% from nurses, 23% from support staff, 20% from managers, and 8% from physicians — and most were resolved within 24 hours to a few weeks, according to the hospital's own published account in the Joint Commission Journal on Quality and Patient Safety.