Late this summer, the International Civil Aviation Organisation organised a “Fatigue Risk Management System” (FRMS) Symposium, followed by a FRMS Forum, in Montreal. Attended by over 500 participants – including safety experts from ECA – this important event demonstrated that prescriptive rules are a necessary basis, but not sufficient to manage fatigue. Compliance with the rules does not mean an operation is safe. Instead, fatigue needs to be managed proactively and FRMS is an important additional tool in that respect.