电商补货预测失准怎么用 sell-through 和 safety stock 修正

上周我们按系统建议补货,模型看起来没错,实际还是断了两个 SKU。复盘后发现不是预测公式完全失效,而是大促后的 sell-through 速度变了,安全库存还按平时销量算。 我把近 14 天的 sell-through、lead time、在途库存和取消单率拉出来,对比 vendor 实际交期。一个 SKU 的转化因为达人内容突然上升,但补货逻辑只看 30 天移动平均,反应太慢;另一个 SKU 是 3PL 入库延迟,系统把在途当成可售。我们把高波动 SKU 单独设 service level,安全库存按 lead time variance 调整,并让采购每天下午复核 in-transit aging。 电商运营经验是,补货不是一次性公式。建议同行把预测、采购、仓库入库拆开看,尤其是促销后和内容曝光后,sell-through 比销售额更早暴露断货风险。

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