Availability Leakage — the CV winner you shouldn't ship
Leakage de Disponibilidad — el ganador del CV que no deberías shipear
CRISP-ML(Q) study on the Favorita dataset (Kaggle): transactions correlates
0.84 with sales and tops feature importance — but it doesn't exist at forecast time. The
leak doesn't inflate a score, it inverts model selection. RMSLE gap +0.060 (47%).
Estudio CRISP-ML(Q) sobre el dataset Favorita (Kaggle): transactions
correlaciona 0.84 con ventas y lidera la importancia de features — pero no existe al
forecastear. El leak no infla un score, invierte la selección de modelo. Gap +0.060 (47%).