NCGS Result Levels
Input, activity, output, outcome, impact. Trees planted is an output; survival an outcome; shade, food, habitat and carbon are impacts, each needing its own evidence.
Activity
Work done: site assessment, species selection, planting, training, maintenance, monitoring.
Impact
A downstream benefit a persistent outcome produces: shade, food, habitat, carbon, quality of place.
Input
Resources the programme brings: funding, tree stock, water, a steward, a site with agreement.
Outcome
A persistent state difference following an output over time: survival, establishment, stewardship persisting.
Output
A state produced directly by an activity: a tree planted, a consignment acknowledged, a site assessed, planting withheld.