FFF certifications requirements
When I got my certification, it was a two-fold process. A written test, first, comprised of about 20 questions. After passing that, you go outside for casting. Accuracy, distance, specialty casts, the ability to demonstrate how NOT to cast (tailing loops, etc.) and identification of a caster's problem and the ability to correct those problems are all included.
The focus these days apparently is on the ability to teach--something that the early days of certification didn't emphasize as much.