Query Transformation & Routing

Practise and Check

Deliverable

Query-transformation matrix: run multi-query, RAG-Fusion, HyDE and decomposition on the same 30 questions and record which question types each one helps, which it hurts, and the added latency and cost.

Assessment

Answer the five Interview questions without notes, then run the lab.

Interview probe

You ship RAG-Fusion for Larkspur's support assistant. A customer asks "What happens if my server goes down?" and gets reboot instructions instead of the SLA credit policy. Recall on the golden set went up. What happened?

Common mistakes

• Passing the expanded query, not the original question, to the answer prompt
• Returning doc.id values from the fusion merge instead of documents
• Splitting free-text decomposition output on newlines instead of structured output

Related Modules

• T6.1Retrievers & Hybrid Search
• T6.3Post-Retrieval Optimisation & Reranking
• T6.4End-to-End RAG Systems
• T6.5Multimodal RAG