O'PEEP'S CRITICAL TO QUALITY (CTQ) EXPLANATION
You are planning a family trip. The kids aren't so sure it'll be fun. Fun? Do they mean: sun lounger, beer, putting feets up? Oh no, it’s: water slide & sand! This is quality-critical for them, or these are "Critical to Quality Attributes, CQAs“. This even makes it possible to measure how well you meet their requirements.
CTQ is a metric that reflects what the customer wants in a way that can be measured objectively.