Goal Question Metric | Glossary

Definition:

A set of questions is used to define models of the object of study and then focuses on that object to characterize the assessment or achievement of a specific goal. Quantitative level (Metric) A set of metrics, based on the models, is associated with every question in order to answer it in a measurable way.

Further Reading:

Book: Disciplined Agile Delivery by Scott Ambler and Mark Lines.