SAP-MM-采購合同
為了降低采購成本、維護與供應(yīng)商的長期合作關(guān)系、簡化采購中間環(huán)節(jié)控制（例如反復(fù)的詢價報價），企業(yè)可以與供應(yīng)商簽訂長期采購合同Contract。在產(chǎn)生了實際的物料需求時，可以根據(jù)采購合同issue Release Order（即Create Release Order against Contact）。
1.創(chuàng)建采購合同（Tcode: ME31K）
Path: Logistics->Material Management->Purchasing->Outline Agreement->Contract->Create
創(chuàng)建Contract有很多的方式：Manual、Copy Document、Reference to PReq、Reference to RFQ。 Agreement Type：
數(shù)量合同：目標數(shù)量已知，系統(tǒng)強制要求輸入Target Quantity。
價值合同：目標價值已知，系統(tǒng)強制要求輸入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.
輸入采購組織和采購組，Enter，
意思是設(shè)置階段我們沒有指定采購組織和公司代碼的關(guān)系，在這里輸入公司代碼，Enter，
在這里主要輸入Validity End=2009-12-30，通常采購合同都是一年一簽。Enter，
輸入物料B-16MNR-12，Target Qty = 20000KG ，Net Price = 6.6（價格上當然要比前面的6.7RMB/KG優(yōu)惠一點）。Save，
系統(tǒng)提示創(chuàng)建了數(shù)量合同4600000004。
執(zhí)行ME35K來Release Contact，
點擊Release + Save動作，批準采購合同。
2.創(chuàng)建Release Order（Tcode: ME21N）
Path: Logistics->Material Management->Purchasing->Purchase Order->Create->ME21N
參照Contract創(chuàng)建的Purchase Order都叫做Contact Release Order，簡稱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".)
在左邊查詢出之前創(chuàng)建的采購合同4600000004，拖放到Header上方的.小車內(nèi)，系統(tǒng)將自動創(chuàng)建出一張采購訂單，輸入本次采購數(shù)量120KG，當然價格6.60可以根據(jù)需要進行二次調(diào)整（默認帶出的是采購合同的Net Price）。從這里也可以看出對于數(shù)量采購合同，Target Quantity是一定的，但是Value可能會有所變化。
后續(xù)的操作在之前的例子中已經(jīng)做過詳細的介紹，這里就不再重復(fù)了。
Over。
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