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arXiv 2601.22326cs.LGstat.AP
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通过分层重要性采样实现高效的分类模型监控

Label-Efficient Monitoring of Classification Models via Stratified Importance Sampling

Amazon(亚马逊)

Lupo Marsigli, Angel Lopez de Haro

AI总结:

本文提出基于分层重要性采样的方法,以提高分类模型监控的标注效率和性能。

摘要:

在生产环境中监控分类模型的性能至关重要却具有挑战性,因为存在严格的标注预算、一次性的批量获取标签和极低的错误率。我们提出了一种基于分层重要性采样(SIS)的通用框架,直接针对模型监控中的这些约束。虽然SIS之前已应用于专业领域,但我们的理论分析证明其广泛适用于分类模型的监控。在温和的条件下,SIS能产生无偏估计器,并在重要性采样(IS)和分层随机采样(SRS)的有限样本均方误差(MSE)上有严格改进。该框架不依赖于最优定义的提案分布或分层:即使在有噪声的代理和次优分层情况下,SIS也能比IS或SRS个体更高效。在二元和多类任务上的实验显示,在固定标注预算下,SIS在效率上的一致改进,证明了SIS作为一种原则性、标注高效且操作轻量的方法,用于部署后模型监控。

英文摘要:

Monitoring the performance of classification models in production is critical yet challenging due to strict labeling budgets, one-shot batch acquisition of labels and extremely low error rates. We propose a general framework based on Stratified Importance Sampling (SIS) that directly addresses these constraints in model monitoring. While SIS has previously been applied in specialized domains, our theoretical analysis establishes its broad applicability to the monitoring of classification models. Under mild conditions, SIS yields unbiased estimators with strict finite-sample mean squared error (MSE) improvements over both importance sampling (IS) and stratified random sampling (SRS). The framework does not rely on optimally defined proposal distributions or strata: even with noisy proxies and sub-optimal stratification, SIS can improve estimator efficiency compared to IS or SRS individually, though extreme proposal mismatch may limit these gains. Experiments across binary and multiclass tasks demonstrate consistent efficiency improvements under fixed label budgets, underscoring SIS as a principled, label-efficient, and operationally lightweight methodology for post-deployment model monitoring.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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