The Gate We Added Because the Data Scared Us
How PlayerGem added a volatility gate after a cluster of outlier performances, what it filtered out correctly, and wh...
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The Gate We Inherited From a Sport We Left
A gate designed for hockey's roster-swap rules survived inside our basketball process for two years before we noticed...
Read itThe Gate We Added to One Sport and Forgot
A gate built for hockey's roster-deadline quirk stayed in the pipeline for two years after we stopped needing it — an...
Read itThe Gate That Passed the Same Player Twice
How a deduplication gap in PlayerGem's availability gate let one basketball player clear evaluation twice in a single...
Read itThe Gate We Added Because a Colleague Misremembered
A gate PlayerGem added to its evaluation process came from a colleague's confident but incorrect memory — and turned ...
Read itThe Calibration Gap We Explained Away
PlayerGem's calibration review found a persistent confidence-accuracy gap for one quarter — and the shop spent most o...
Read itNo Single Night May Dominate the Slate
How PlayerGem's concentration cap on single-night ratings was written, what it cost in apparent precision, and why we...
Read itIf You Cannot Grade It, Do Not Publish It
PlayerGem's rule against publishing ungraded ratings — what broke without it, what the shop tried, and why the rule s...
Read itRules We Made Up That Turned Out to Be Wrong
Four internal rules PlayerGem ran on for months — each one written after a real failure, each one eventually wrong in...
Read itDistrust Any Result You Are Pleased About
Bad results get investigated because they demand it. Good ones supply their own explanation, which is exactly why they need scrutiny more.
Read articleNever Delete a Rating, Only Grade It
Once a rating exists it stays and gets graded however it turns out. The rule sounds like theatre until you see what deletion does.
Read articleWrite the Threshold Down Before You See the Data
The single most useful rule we have, and the one that took the longest to accept, because following it means being wrong on the record more often.
Read articleAll Doctrine Articles
- The Gate We Added Because the Data Scared Us
- The Gate We Inherited From a Sport We Left
- The Gate We Added to One Sport and Forgot
- The Gate That Passed the Same Player Twice
- The Gate We Added Because a Colleague Misremembered
- The Calibration Gap We Explained Away
- No Single Night May Dominate the Slate
- If You Cannot Grade It, Do Not Publish It
- Rules We Made Up That Turned Out to Be Wrong
- Distrust Any Result You Are Pleased About
- Never Delete a Rating, Only Grade It
- Write the Threshold Down Before You See the Data