The Swiss cheese model of accident causation  is a framework for thinking about how to layer security measures to minimize risk and prevent failure. The idea is that when several layers of interventions, despite their weaknesses, are properly stacked up between a hazard and a potentially bad outcome, they are able to cumulatively prevent that outcome because there’s no single point of failure. During the pandemic, health care workers and public health officials have been using the Swiss cheese model to visualize how various measures can work together to help keep people safe.[…]

Source: The Swiss Cheese Covid-19 Defense