Article Source

• Explainable Data Drift for NLP

Explainable Data Drift for NLP

Abstract

Detecting data drift, although far from solved-for tabular data, has become a common approach to monitor ML models in production. For Natural Language Processing (NLP) on the other hand the question remains mostly open.

In this session, we will present and compare two approaches. In the first approach, we will demonstrate how by extracting a wide range of explainable properties per document such as topics, language, sentiment, named entities, keywords and more we are able to explore potential sources of drift.

We will show how these properties can be consistently tracked over time, how they can be used to detect meaningful data drift as soon as it occurs and how they can be used to explain and fix the root cause.

The second approach we will present is to detect drift by using the embeddings of common foundation models (such as GPT3 in the Open AI model family) and use them to identify areas in the embedding space in which significant drift has occurred. These areas in embedding space should then be characterized in a human-readable way to enable root cause analysis of the detected drift. We will compare the performance and explainability of these two methods and explore the pros and cons of each approach.