Understanding the Coffee Quality Institute's Grading System
8. Understanding the Coffee Quality Institute's Grading System Introduction CQI's grading system is the technical backbone behind terms like "Q score" and "Fine Robusta" — here's how it actually works. Why This...
2026 standards context: Separate the two layers clearly. CQI's current Q Coffee sample process continues to use CQI Fine Robusta Standards and Protocols for Robusta sample evaluation. The professional Q Grader education/licensing program itself moved to SCA on October 1, 2025 and was updated around Coffee Value Assessment (CVA). This page is background on the CQI system; the broad grading owner is Fine Robusta Grading: What Buyers Can Verify Before Cupping.
8. Understanding the Coffee Quality Institute's Grading System
Introduction
CQI's grading system is the technical backbone behind terms like "Q score" and "Fine Robusta" — here's how it actually works.
Why This Matters
Buyers negotiating on the basis of a cupping score need to understand what that number represents, and what it doesn't, to use it correctly in contracts and quality control.
Main Explanation
CQI's grading approach is built on a 100-point cupping scale, evaluating attributes like fragrance/aroma, flavor, aftertaste, acidity, body, balance, uniformity, and sweetness for Arabica, with an adapted set of attributes for Robusta that accounts for its different sensory chemistry — including salt/acid and bitter/sweet ratios rather than pure acidity.
Alongside sensory scoring, CQI's system incorporates physical grading: counting primary and secondary defects in a standardized green coffee sample, checking moisture content, and verifying bean size against contractual specifications. A coffee only earns a top-tier classification, such as Fine Robusta, when it clears both the sensory score threshold (typically 80 points or above) and the physical defect limits.
While the exam that certifies graders now runs through SCA's Coffee Value Assessment framework as of October 2025, the underlying scoring logic — combining sensory and physical evaluation — traces directly back to the system CQI built starting in 2004 and extended to Robusta by 2019.
Comparison Table
| Grading Component | What It Measures |
|---|---|
| Sensory score (0–100) | Aroma, flavor, acidity/body, balance, sweetness |
| Primary defects | Serious flaws (e.g., full black, full sour beans) |
| Secondary defects | Minor flaws counted against a defect limit |
| Moisture content | Typically 10–12% for wet-processed beans |
| Bean size uniformity | Deviation limits from contractual specification |
Real Examples
A Robusta sample scoring 82 points with zero primary defects and only 3 secondary defects in a 350-gram sample would typically qualify as Fine Robusta under the original CQI protocol.
Faq
What's a passing score for specialty-grade coffee?
Generally 80 points or above on the 100-point scale, for both Arabica and Fine Robusta.
Is the scoring system only about taste?
No — it combines sensory cupping scores with physical defect and moisture checks.
Did the scoring criteria change in 2025?
The exam administrator changed (to SCA), but the underlying scoring logic CQI built remains the reference point.
How is Robusta scored differently from Arabica?
Robusta evaluation accounts for its distinct chemistry, such as salt/acid and bitter/sweet ratios, rather than relying on acidity alone.
Who performs the scoring?
Certified graders — historically Q Graders and R-Graders trained under CQI, now certified through SCA's Evolved Q program.
Conclusion
The grading system CQI pioneered — sensory score plus physical defect analysis — remains the backbone of how specialty and Fine Robusta coffee are evaluated today.
Cta
Want to see a full cupping and defect report behind a Fine Robusta lot? Origin Coffee Cambodia (OCC.) provides detailed grading documentation for every export batch.
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