LETSCROWD: Dynamic Risk Assessment for Mass Gatherings

Risks for crowd in mass gathering events are so called "High Impact Low Probability" risks (e.g. terrorism, lone wolfs, domestic extremisms) and therefore managing them accordingly, i.e. without a sufficient statistics, means to "seek a method that leads us to make the least egregious errors in decision-making across the range of possible scenarios that might develop in the future" (Willis, et al., 2005). Thus, the LETSCROWD project proposes an innovative Dynamic Risk Assessment (DRA) methodology for Law Enforcement Agencies (LEAs) to assess risks for the crowd on the basis of dynamically collected information to minimise decision-making errors across the possible scenarios that might develop in the critical time frame from the event planning to the event execution.