供应商不给成本数据怎么办？
如果供应商不给成本数据，那就无法用成本来做分析，这时只能做价格分析，价格分析指把供应商的价格与一个价格基准进行比较，有6种方法：
1）与历史数据进行比较。如果历史上曾经买过同类产品，可以与历史价格相比较。
2）与竞争者方案进行比较。也就是货比三家，与竞争者的价格进行比较。
3）与公布的价格进行比较。有些供应商会把价格进行公示，具体订单在公布基础上进行加加减减，比如宝钢就会进行价格公布。
4）与价格目录进行比较。
5）与市场价格进行比较。这条和前面说的“与竞争性方案比较”有什么区别？我们在公司里做采购，老板就题要求里，你也不能总说自己买的价格高了或者低了，要与市场价格进行比较。
6）进行成本估算。
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