Debug Failed Entity Extraction
Diagnose NER failures by separating boundary, label, and coverage problems.
The miss The extractor finds short company names but cuts off legal suffixes and subsidiaries. A generic retrain request can waste effort if the failure is actually boundary guidance or stable pattern coverage. NER error taxonomy Span -> boundary -> label -> coverage NER predicts both what text belongs to an entity and what type that entity is. Debugging must inspect both. Bad model One vague bucket A targeted fix instead of generic retraining. Classify the error before choosing the intervention. 01 Boundary 02 Label 03 Coverage Span edge The model returns Acme Corp but misses Services LLC.
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