Home & Kitchen > Home Security & Surveillance > Motion Detectors
SIGMA-LKM3000 Presence Sensor + Doorbell
Brand: Generic / OEM
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Audited BOM: 9 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-sensitivity PIR sensor (ENG-001) causes motion detection failures at longer distances, leading to RMA-001 and user complaints (REV-001, REV-003).
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