Is PTH and small via hole wall quality checked by cross-section and followed by a closed loop corrective action?
是否通过切片检验pth与小导通孔孔壁状况，并有相应的改善对策跟踪？
Follow up the supplier corrective action to close loop.
跟踪供应商的纠正措施，以关闭异常反馈报告。
Senior Management regularly reviews effectiveness of the closed loop corrective action of the external audit findings.
高层管理者定期的检讨外部稽核发现的改善措施的有效性。
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