Agile metrics - great resource
This video is a great overview of metrics!
I believe is one the best compilation of metrics with the definition. Had listed not only the productivity and output metrics but also the outcome metrics and most important, from my point of view, the impact metrics. And myself, I considered as a bonus, is the last slide with the 12 rules of measurement. Four Categories of Metrics was reviewed as part of my ShiftUp qulification program: Qualified Agility & Innovation Advancer.