A dashboard shows that ED door-to-physician time improved from 45 minutes to 28 minutes after a process change. To confirm this is a sustained improvement rather than regression, a leader should:
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A
Send a congratulatory email and close the project
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B
Continue plotting the metric on a control chart for at least 12–18 data points post-change
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C
Switch to measuring a different metric
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D
Reduce staffing since throughput improved