Building a Low‑Cost, Privacy‑Safe Logistics QA Bot with Hybrid Retrieval & LLM

This article describes a privacy‑preserving, low‑cost logistics QA bot that combines data cleaning, augmentation, BM25 and vector retrieval, a DNN rerank model, and LLM‑based answer rewriting, along with evaluation results and deployment considerations.

Hybrid RetrievalLLM rewritingLogistics

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Building a Low‑Cost, Privacy‑Safe Logistics QA Bot with Hybrid Retrieval & LLM