Observation Progression

Definition

Observation Progression is a roast phenomenon where the cup presents as observationally distinct across different days after roasting — not just across different temperatures within a single session. Day 1, Day 4, and Day 7 are meaningfully different sensory states of the same batch.

In Plain Terms

The cup shows something different on Day 1, Day 4, and Day 7. Each day is a distinct observation.

Observable Conditions

— Cup behavior on Day 1 is present but restrained — something is waiting
— A measurable shift in acidity, sweetness, and body occurs between Day 1 and Day 4
— By Day 7, the cup has moved into a different and more integrated sensory state
— The progression is consistent and repeatable across consecutive batches
— Each stage is observationally complete — not incomplete versions of a final state, but distinct states in sequence

Relation to Conventional Framework

Conventional coffee freshness guidance typically treats post-roast time as a degassing period — the coffee improves until it peaks, then declines. Observation Progression documents something more specific: the cup does not simply improve or decline linearly. It moves through distinct sensory states. Each state has its own observable character.

Research Status: Active Documentation
Read full definition:  Observation Progression | SUNNY M Lab Phenomena Atlas