{"query": "What 'six sigma' actually means", "count": 1, "results": [{"id": "card_works_six_sigma", "title": "What 'six sigma' actually means", "shelf": "the-works", "surface": "secular", "snippet": "A process running at 3.4 defects per million opportunities is, by definition, at the six-sigma quality level — the target that named a whole discipline.  Worked & sealed by the engine — 3.4 DPMO → 6.0", "authority_tier": "verified", "source": "The Works — worked & sealed", "generated": false}]}