A high-growth enterprise is one that is successfully scaling up. The Organisation for Economic Cooperation and Development (OECD) defines it as having "an average annualized growth greater than 20% a year, over a 3-year period, and with 10 or more employees at the beginning of the observation period." In its definition, the European Union sets the growth threshold at 10%. The OECD also refers to such businesses as "scalers."