在国外的职业名称里，Buyer 跟sourcing 是不一样的，至于区别参考如下：

Sourcing is responsible to source new vendors and new products as per client's request and trend guide. Sourcing guy needs to negotiate the payment term with vendor and push vendor to follow up with the working procedure.
Sourcing guy needs to take care of the factory audit, he is not able to present a vendor without passing the Social Audit.
Sourcing guy needs to work with both buyer and vendor to get the final deal.
Sourcing guy is always requested to be sensitive of the trend in the market.

As a buyer, he needs to be resp***ible to order's execution, on time delivery with qualified merchandise is his first priority. He needs to follow up with vendor on any quality issue, push vendor to follow the correct packing way (if there was special request). He also needs to watch vendor's production schedule time to time.
Sometime, buyer also needs to take care of the merchandise's allocation once they arrived and setup the shelf with attractive display.
He has to read the sales report to decide the potential repeat order.

今天跟客户在市场几翻纠结折腾，很累……

现场下单，核对图纸的每一个细节，这样算什么？