H · Hallucination · hybrid retrieval
Hybrid retrieval
Semantic search + keyword search, combined and reranked. The helpcode default.
In one sentence
Hybrid retrieval combines vector (embedding-based) search with lexical (BM25 or similar) search, then fuses and reranks the results so neither approach loses recall on its own.
When it matters
When the knowledge base contains alphanumeric codes (model numbers, error codes, SKUs) that semantic search struggles to capture — embeddings of "E03" and "error E03" can be far apart.
A real-world example
Industrial pumps, 1,200-page manual. Query "startup noise model P-340": semantic search captures "startup noise" but ignores "P-340"; keyword search captures "P-340" but ignores "startup noise". Hybrid captures both, the reranker orders them, the right answer comes back in 1.4 s.
Curated by helpcode research team · Last reviewed 2026-05-22
Where this matters in practice
Industry
Electrical appliances
Self-service troubleshooting with QR codes on each unit — from coffee machines to washing machines. Guides, error code resolution, spare parts identification.
Industry
HVAC systems
Diagnostics for chillers, boilers and ventilation. Schematic search across PDFs, voice-first for hands-busy work.
Industry
Heat pumps
Installation guidance, error code lookup, refrigerant safety procedures, compliance audit trails.
Industry
Facility management
Tenant incident reporting via chat, voice or QR, with auto-routing to your CMMS.
Industry
Consumer electronics
Interactive setup wizards, multi-language by default, integrated with warranty + RMA flow.
Industry
Power tools
Battery diagnostics, calibration walkthroughs, warranty + RMA flow integration.