Fig. 2From: Statistical process monitoring to improve quality assurance of inpatient careSimulation of ST-CUSUM. Percentage of ST-CUSUM charts signalling a process deterioration (alarm rate) from 2000 simulated in-control (top) and out-of-control (bottom) ST-CUSUM runs. The desired false alarm probability is marked by black symbols. a In-control signal rate. b Out-of-control signal rateBack to article page