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SIGMA-FE20 Surface Mount Biometric Digital Door Lock
Brand: Generic / OEM
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Audited BOM: 12 Components
RMA Chain & Defect Intelligence
Root cause causal graph linking factory engineering flaws to verified consumer return reasons.
⚡ Causal Link: Defect to Consumer Return
The low-quality locking motor (tier 3) with plastic gears (ENG-002) fails prematurely, preventing the door from locking/unlocking (RMA-001), which is reported by users (REV-002).
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+5 additional failure modes & return complaint chains locked
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