Perla RJ, Provost SM, Parry GJ, Little K, Provost LP. Understanding variation in COVID-19 reported deaths with a novel Shewhart chart application. Int J Qual Health Care. 2020 Jun 26. Online ahead of print.
A novel Shewhart chart was developed to help health care leaders and frontline teams understand if day-to-day variation in COVID-19 deaths may be attributed to meaningful signals of change. The chart detected the start of exponential growth and identified early signals that the growth phase was ending, offering a practical tool to visualize and learn from daily reported deaths during a pandemic or an epidemic.