An interactive on variation
One hundred hospitals. One hundred operations each. Every patient has the same chance of dying. Recalculate and watch random variation label hospitals "unacceptable" — even though every hospital is identical.
A Process Behavior Chart of your hospital over time, using Wheeler's XmR method. Points inside the limits reflect routine variation — the system doing what it does. A point outside the limits is a signal to investigate, not proof that something changed.
Based on the BBC's original "Can chance make you a killer?" simulation, reconstructed to teach the same lesson: a stable, predictable system will routinely produce period-to-period swings that look like performance differences. Without Process Behavior Charts, leaders reward and punish luck.
Learn more about understanding variation in healthcare metrics and Measures of Success.