Sourcing 强调通过搜索、比较、资源整合之后再购买，过程一般比较长。

Buy 是比较日常的用语，购买小型物品时使用。

Procurement 是通过比较正式的谈判之后购买，强调采购的决策，范围一般比purchase 要大。

Purchase 采购，比procurement 范围要小。强调采购的动作呢。

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Purchasing & Procurement

Purchasing refers to a business or organization attempting for acquiring goods or services to accomplish the goals of the enterprise. Though there are several organizations that attempt to set standards in the purchasing process, processes can vary greatly between organizations. Typically the word “purchasing” is not used interchangeably with the word “procurement”, since procurement typically includes Expediting, Supplier Quality, and Traffic and Logistics (T&L) in addition to Purchasing.

Procurement is the acquisition of goods or services. It is favorable that the goods/services are appropriate and that they are procured at the best possible cost to meet the needs of the purchaser in terms of quality and quantity, time, and location. Corporations and public bodies often define processes intended to promote fair and open competition for their business while minimizing exposure to fraud and collusion.