BOM 变更最怕只写料号。建议字段：旧料号、候选料号、变更原因、是否 Pin-to-Pin、验证计划、风险负责人（岗位即可）。指南：/guides/selection-bom-fields。不构成采购建议。

English: Old/new PNs, reason, pin-to-pin flag, validation plan, risk owner role.