# SCRIMED Hybrid Retrieval Engine

SCRIMED Hybrid Retrieval is a synthetic/no-PHI retrieval architecture layer. Clinical settings require citations and evidence; the system must not answer clinical questions without evidence and does not authorize diagnosis, treatment, prescribing, EHR writeback, or payer submission.

## Ranking Formula
- 0.32*bm25 + 0.38*vector + ontology + graph + trustTier

## Ranked Synthetic Sources
- #1 Reviewed clinical guideline summary placeholder: score=0.844; trust=reviewed; citation_required=true
- #2 FHIR Observation semantic mapping fixture: score=0.803; trust=synthetic_fixture; citation_required=true
- #3 Synthetic prior authorization policy criteria: score=0.771; trust=internal_policy; citation_required=true

Clinical setting: do not answer without evidence; cite sources and require human review for high-risk content.