问题描述：
[单选]
What"s the purrpose of ECN Check list？ECN 检查表的目的是a． Define plan and make things be trackable 制定计划并使之可追溯"b． Self-check for all actions requested for engineering change对工程更改要求的措施自检"c． Support external audit外部稽核要求"d． Including all above以上所有"
A．A
B．B
C．C
D．D
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上一篇：Which one is correct about PFMEA process scope？PFMEA 中正确的工艺步骤是a． Final Assembly， Post Process Operation， Finished Goods store and shippment总装，后工序，成品储存和发运b． Cutting， Lead Prep， Final Assembly， Post Process Operation开线，预装，总装，后工序c． Raw Material， Cutting， Lead Prep， Final Assembly， Post Process Operation， Inspection， Finished Goods store and shippment原材料，开线，预装，总装，后工序，检验，成品储存和发运d． Raw Material， Cutting， Lead Prep， Final Assembly， Post Process Operation， Finished Goods store and shippment原材料，开线，预装，总装，后工序，成品储存和发运
下一篇：When is ECN check list needed？什么时候需要用ECN 检查表a． Sample drawing 样品图纸b． Engineering change for offical drawing or M-permit 对正式图纸进行的工程变更或M-permit"c． First version of new drawing 新图第一版d． S-permit
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