SAPMM采购合同
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SAP秀才-MM学习指南-4.采购合同
Contract and Release Order
为了降低采购成本、维护与供应商的长期合作关系、简化采购中间环节控制（例如反复的询价报价），企业可以与供应商签订长期采购合同Contract。在产生了实际的物料需求时，可以根据采购合同issue Release Order（即Create Release Order against Contact）。
1.创建采购合同（Tcode: ME31K）
Path: Logistics->Material Management->Purchasing->Outline Agreement->Contract->Create
创建Contract有很多的方式：Manual、Copy Document、Reference to PReq、Reference to RFQ。
Agreement Type：
数量合同：目标数量已知，系统强制要求输入Target Quantity。
价值合同：目标价值已知，系统强制要求输入Target Value。
•Quantity contracts
Use this type of contract if the total quantity to be ordered during the validity period of the contract is known in advance. The contract is regarded as fulfilled when release orders totaling a given quantity have been issued.
•Value contracts
Use this type of contract if the total value of all release orders issued against the contract is not to exceed a certain predefined value. The contract is regarded as fulfilled when release orders totaling a given value have been issued.
输入采购组织和采购组，Enter，
意思是设置阶段我们没有指定采购组织和公司代码的关系，在这里输入公司代码，Enter，
在这里主要输入Validity End=2009-12-30，通常采购合同都是一年一签。Enter，
输入物料B-16MNR-12，Target Qty = 20000KG ，Net Price = 6.6（价格上当然要比前面的6.7RMB/KG 优惠一点）。Save，
系统提示创建了数量合同4600000004。
执行ME35K来Release Contact，
点击Release + Save动作，批准采购合同。
2.创建Release Order（Tcode: ME21N）
Path: Logistics->Material Management->Purchasing->Purchase Order->Create->ME21N
参照Contract创建的Purchase Order都叫做Contact Release Order，简称Release Order，也可以叫做Call-off Order。
Over the contract validity period, certain quantities of the materials or services covered are released (called off) against the contract as and when required through the issue of purchase orders referencing the latter. Such purchase orders are thus termed "contract release orders" or simply "release orders". (Outside SAP, particularly in the UK; they may also be referred to as "call-off orders".)
在左边查询出之前创建的采购合同4600000004，拖放到Header上方的小车内，系统将自动创建出一张采购订单，输入本次采购数量120KG，当然价格6.60可以根据需要进行二次调整（默认带出的是采购合同的Net Price）。从这里也可以看出对于数量采购合同，Target Quantity是一定的，但是Value可能会有所变化。
后续的操作在之前的例子中已经做过详细的介绍，这里就不再重复了。
Over。