S03¶


Research	R0050 — Journalism and Other Truth-Seeking Disciplines
Run	2026-03-31
Query	Q002
Search	S03

WebSearch — Bradford Hill criteria and FMEA/FTA engineering safety analysis

Summary¶

Field	Value
Source/Database	WebSearch
Query terms	(1) "Bradford Hill criteria epidemiology causation evidence evaluation methodology" (2) "FMEA fault tree analysis engineering safety evidence evaluation" (3) "FMEA risk priority number RPN severity occurrence detection"
Filters	None
Results returned	30
Results selected	2
Results rejected	28

Selected Results¶

Result	Title	URL	Rationale
S03-R01	Bradford Hill criteria — Wikipedia	https://en.wikipedia.org/wiki/Bradford_Hill_criteria	Comprehensive overview of the nine viewpoints
S03-R02	Risk Priority Number (RPN) in FMEA	https://www.6sigma.us/six-sigma-articles/risk-priority-number-rpn/	Detailed explanation of FMEA's structured scoring methodology

Rejected Results¶

Result	Title	URL	Rationale
S03-R03	Various Bradford Hill and FMEA articles	Multiple URLs	Secondary descriptions or narrow application papers

Notes¶

Bradford Hill search confirmed the nine viewpoints are well-established but largely subsumed by GRADE/IPCC synthesis. FMEA search revealed the RPN three-axis scoring as a genuinely novel structured approach to risk quantification.