Part of the Production Science school. Class 3 of 6.
The capability: you can write an infusion procedure that produces the same product in someone else's hands.
Prerequisites: Modules 14, 45.
The practice
Taste an infusion at intervals and record where the peak falls.
Then do it again with a different ingredient lot and see how far the peak moves.
Then over-extract one batch on purpose and learn what the far side tastes like.
Then taste a chile infusion hourly and notice that it does not plateau — capsaicin extracts continuously and the only correction is dilution with more base spirit.
And rewrite one procedure to specify weight and a tasting endpoint rather than counts and a duration.
The reference
The peak sample from the interval tasting.
What you are building
The understanding that a procedure specifying a duration is not a procedure.
Because the extraction peak moves with ingredient intensity and ambient temperature, per Module 45 — which means a document written in March produces a bitter batch in August with nobody having made a mistake.
Verification and boundary
Hand the rewritten procedure to someone who has never made it and compare their output.
Boundary: house-produced infusion labeling, dating, and shelf-life determination are governed by the local health authority, and some preservation processes require documented validation.