How the score is built

Medal points

Every competition is reduced to the same five bands so a guide score and a medal can share a column. Flos Olei publishes scores rather than medals. Sample rows already use bands. A real import of that guide must keep the raw score and map it with a table we publish first.

Prestige

Prestige weights are editorial coefficients. They are not measurements, and they are not how the competitions rank themselves. Version 1.0 is a starting hierarchy: the largest institutional and international contests sit at the top, and smaller or more local ones still count. Changing a weight is a version change, not a silent edit.

Recency

A medal ages. The factor depends on how many ranking years sit between the award and the table. Awards older than three years stay visible at 0.20 so history is not deleted, and so it cannot hold a place on its own.

The competition score

Award points equal medal points × prestige × recency, rounded to two decimals. The competition score is the mean of the highest three of those values, rounded to one decimal. If the oil has fewer than three awards, the mean uses however many exist. Further medals stay on the page and do not move the number. One lucky gold cannot be buried, and a drawer of minor medals cannot take over.

The laboratory score

Each measurement is mapped onto 0–100 between a poor anchor and a good anchor, clamped, and rounded to one decimal. Lower is better for acidity, peroxide, K232, and K270, so the good anchor is the smaller number. The laboratory score is the weighted sum, rounded to one decimal.

The final score

When a laboratory panel exists, the published score is 0.70 × competition score + 0.30 × laboratory score, rounded to one decimal. The components are already rounded to one decimal before this step, so the arithmetic on the oil page is the arithmetic. When no panel exists, the published score is the competition score. The missing 30% is not spread across the medals.

0.70 × competition + 0.30 × laboratory

What is left blank

No laboratory panel means a blank lab column, not a guessed one. No price means a blank price, not an average of the neighbours. Panel scores published by a competition are stored on the medal and are not mixed into version 1.0, because a 90 in one room is not a 90 in another.

Price

Offers are converted to euros per litre with fixed sample rates for 2026-10: one euro is one euro, one US dollar is 0.92 euro, one pound is 1.17 euro, one Australian dollar is 0.60 euro. The rates exist so a 375 ml tin and a 500 ml bottle can share a filter. They are not a live exchange feed, and they do not enter the score.

EUR 1 · USD 0.92 · GBP 1.17 · AUD 0.6

A worked example

The current leader of the sample table, computed from the same function as the oil page. It is still sample data.

Kamen 2025

Competition 78.7 · Laboratory 93.8 · Score 83.2

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Where the code lives

The implementation is src/lib/scoring.ts. Prestige weights live in data/competitions.json so they can be edited without hunting through the formula. data/SCHEMA.md describes every file the importer has to touch.