Input and Output Measures
The difference between input and output measures is often a source of confusion when discussing performance measures. This illustration may help to explain this difference.
The Arch Metropolitan Theodrakis Christodoulou was for many years the much loved pastor of his flock in his sprawling See in rural Greece. His family were of simple farming stock and the young Theodrakis was a keen student at the humble village school, walking bare foot 3 miles there and back in weather fine and foul and never missing a lesson.