批次漂移:模型上线后才开始

批次漂移:模型上线后才开始

检测与决策 Elective 8 hours · B 级方法 + C 级示意
3 个月 → 召回 −18 点
Why this chapter

换炉号、换供应商、换季节光照,输入分布就变了。监控特征分布(PSI / KS),比监控准确率更早发现问题。

Tools

Pandas · Evidently

Deliverable

漂移监控 + 触发重训的判据

Key numbers
上线 3 个月召回 −18 点(示意)
PSI > 0.25显著漂移(惯例)
重训周期按漂移触发,不按日历
Related papers
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