Uniformity (SCA cupping)
SCA criterion evaluating consistency across 5 cups from the same lot during cupping. Each non-uniform cup removes 2 points. A uniform lot guarantees roasting and processing consistency.
Background & Context
Uniformity is a discrete attribute scored on the SCA cupping form — evaluating whether all five cupping bowls prepared from the same coffee lot taste consistently alike. In SCA protocol, five replicate cups are prepared from each lot; each cup receives 2 points if it matches the others in flavour and defect status, for a maximum score of 10/10. Any cup that differs noticeably from the others loses its 2 points. Uniformity is a measure of processing consistency and lot homogeneity — a coffee that scores 10/10 in uniformity demonstrates that the processing and drying were consistent across the lot, with no individual cups showing fermentation defects, quakers (underdeveloped beans), or off-flavours that would indicate sorting failure. Uniformity and clean cup are the two attributes on the SCA form that directly penalise defects rather than rewarding positive qualities.
Practical Use
Low uniformity scores are the most commercially actionable red flag in a cupping report. A lot scoring 6/10 on uniformity (two of five cups failed) indicates that at minimum 40% of that lot's cups may contain detectable defects — an unacceptable quality standard for specialty supply. The remedy requires investigating at the processing level: was the drying uniform (covered raised beds, consistent turning)? Was the sorting rigorous (electronic colour sorting to remove quakers and defective beans)? Was fermentation time controlled precisely? For buyers evaluating cupping reports, a lot with individual attribute scores of 8+ but uniformity below 8 should be declined or renegotiated — the defect rate makes consistent café service impossible. Only uniformity scores of 9–10/10 (at most one failed cup) are acceptable for specialty purchasing decisions.
Related Terms
Related terms: Cupping, SCA score, Specialty coffee, Drying, Coffee grade.