Plain English Meaning
The fixed yardstick a flight instructor measures the learner against. It's not the instructor's personal opinion of 'good enough' — it's the written criteria that say what counts as a pass.
Full Definition
The defined performance criteria — drawn from the Practical Test Standards, Airman Certification Standards, FAA handbooks, or the published lesson objectives — against which a learner's knowledge, skill, or maneuver is judged acceptable or unacceptable.
Context Anchor
Seen in flight instruction when an instructor evaluates a learner’s performance during a lesson, practice flight, or .