The University of California at Davis 20 Point Scale System Organoleptic Evaluation
Scoring Guide For Wine The Davis system was developed by Dr. Maynard A. Amerine, Professor
of Enology at the University of California at Davis, and his staff in 1959 as a method of
rating the large number of experimental wines that were being produced at the university.
The Davis system is quite straightforward. It assigns a certain number of points to each
of ten categories which are then totaled to obtain the overall rating score for a given
wine.
17 - 20 Wines of outstanding characteristics having no defects
13 - 16 Standard wines with neither oustanding character or defect
9 - 12 Wines of commercial acceptability with noticeable defects
5 - 8 Wines below commercial acceptability
1 - 5 Completely spoiled wines
Appearance (2 points) - The wine is given 2 points if it is brilliant, with no dullness,
murkiness, or particles of sediment. If it is clear, but not flashing with light
reflections, it rates 1 point. If full or cloudy it gets 0.
Color (2 points) - Acceptable colors for white wines are varying shades of yellow, gold,
straw. Flaws are any amber tones, indicating oxidation. A rosé can be a true pink, or by
reason of its grape source, tinged with deeper red or orange.Overly violet tints, brown
tints of amber or deep red are faults. The color of red wines depends greatly upon the
grape variety. Pinot Noir may be light enough to verge on transparency. Cabernet or
Zinfandel will be deep red. Newer or younger wines will often have blue-purple edges, as
older wines will show bronze edges.
Aroma and Bouquet (4 points). Aroma is the sensory impression arising from the mouth with
the assistance of the sinus chimneys. Bouquet is fragrance detected by the nose. Either
may be vinous, smelling like wine, but without any grape variety characteristics. The
intensity may be light, medium, or high. Negative factors are odors that can be described
as alcoholic, excessively woody, moldy or corked.
Volatile Acidity (2 points) - This is the term for Vinegary-ascensence. Does the wine
smell of vinegar? If not, it rates 2 points. A slight vinegar smell will rate 1 point. If
it smells of vinegar it rates 0.
Total Acidity (2 points) - Felt in the mouth, around the edges of the tongue, it is wine's
refreshing zing. If low, the wine is flat, flabby or soapy. It can be too high with
unpleasant sharpness.
Sweetness/sugar (1 point) - Sugar and total acidity go together. Overly set for the wine's
type is a fault, as is overly dry.
Body (1 point) - This is the wine's viscous nature identified as mouth-feel, also the
binges, or alcoholic strength.
Flavor (1 points) - The flavor should correspond with the bouquet and aroma, being clean,
fruity, full or balanced. It should not be metallic, steamy, or alien in character.
Astringency (2 points) - Tannins give a wine astringency (or bitterness), and so does the
wood in which wine is aged. Younger wines will be rougher than older wines. The ideal is
mellow softness, velvet, roundness. A young wine is not discounted for a natural tannin.
General Quality (2 points) - The only category for subjective appraisal, adjusting the
score on the basis of the wine's total performance.
