Detection of out of control signals typically involves the use of surveillance systems, which collect and analyze data on disease incidence. These systems use statistical methods to compare current data with baseline data from previous periods. Common techniques include:
Control charts: Graphical tools used to monitor the variability of disease incidence over time. Time-series analysis: Statistical methods that analyze data points collected or recorded at specific time intervals. Spatial analysis: Techniques that examine geographical patterns to identify clusters or hotspots of disease.
