真实 8D 报告实例,包含完整 D0-D8 分析。学习 PCB 焊点裂纹、热失控等实战案例。含 5-Why 和鱼骨图。
实例 1:PCB 焊点裂纹(电子制造) D2:P3 焊点 0.3mm 径向裂纹致间歇性断路。Lot#A382,夜班生产。8/200 失效(4%, 40,000 PPM)。 D4 5-Why:焊点空洞 >25% → 回流焊温度曲线升温过快 → 3 区热电偶读数偏低 15°C → 未按期更换 → PM 计划遗漏回流焊传感器。 TRC:焊点空洞超标。MRC:PM 计划排除关键传感器。逃逸点:AOI 允收标准 30%(设计需求 15%)。 实例 2:电机控制器热失控(汽车) D4:FET 驱动 IC 在 85°C 时 latch-up → PWM 死区时间不足 → IC 数据手册勘误未在设计评审中审查 → MRC:设计评审清单缺失勘误验证步骤。 好的 8D 报告特征 具体的问题描述 — 数据而非形容词 有证据的根因 — 每个 5-Why 环节都有数据支撑 TRC + MRC 都识别 — 技术和管理根因 验证过的纠错 — 能力研究、试生产数据 系统性预防 — FMEA 更新、水平展开
8D.wiki — Quality Engineering Knowledge Base
8D.wiki is a professional AI-driven platform for generating IATF 16949 compliant 8D reports. Features include AI root cause analysis, 5-Why methodology, and one-click PDF/Word export. Start generating your free 8D report today.
The 8D (Eight Disciplines) problem-solving methodology is the global standard for quality engineering under IATF 16949. It guides teams through D0 (Preparation and Emergency Response), D1 (Cross-Functional Team Formation), D2 (Problem Description using 5W2H), D3 (Interim Containment Actions), D4 (Root Cause Analysis), D5 (Permanent Corrective Action Verification), D6 (Implementation of Corrective Actions), D7 (Recurrence Prevention), and D8 (Team Recognition and Closure). Each discipline provides a structured approach to identifying root causes, implementing effective solutions, and preventing recurrence.
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