Dual UOM是随着Process Manufacturing（流程制造）的加入，在Oracle EBS R12中新加的特性。对于Dual UOM的物料，查库存时，Workbench不仅会显示主计量单位(Primary UOM)，同时也会显示次计量单位（Secondary UOM）。
Dual UOM适用于特定的行业，比如化工，食品...，具体的例子，以牛肉为例，在欧美常常以磅(Pounds)作为牛肉主计量单位，但中国更习惯使用公斤来作为主计量单位。对于这样的物料就有必要启用双单位控制。
上图中红色部分即为计量单位相关的物料设置。
Primary:主计量单位，所有的物料都需要有一个主计量单位。后台的逻辑运算，报表等也都是基于主计量单位来的。
Tracking:这个就是控制物料是否为双单位的属性。（组织级别属性）
Primary:库存只显示主计量单位
Primary & Secondary: 库存会同时显示主计量单位以及次计量单位
Pricing:这个属性控制，在计价的时候，价格是基于主计量单位还是次计量单位。(组织级别属性)
如果这个值为Secondary，发运时（Ship Confirmation），系统会在订单行上重新算价格。
Secondary:如果Tracking是Primary & Secondary(Dual UOM Item)或者Pricing为Secondary，那么你在这个数量里设置次计量单位。(组织级别属性)
No DefaultThe system stores inventory in both the primary and secondary units of measure. Use this option when the default conversion between the two units of measure is usually not the same. The system does not automatically display in the secondary unit of measure when you specify the quantity for the primary unit of measure. You manually enter the quantity of the secondary unit of measure before you process a transaction. The secondary quantity can fluctuate from the default conversion by the factors that you specify in the Deviation + and Deviation - attributes.
Deviation Factor +
You can enter acceptable deviations as decimal values. This attribute is assigned at the organization level. This produces a plus or minus tolerance of acceptability. For example, if the allowable transaction quantity deviation for the item is 10 percent higher
than the established conversion, you would enter 10 in this field.
Deviation Factor -
You can enter acceptable deviations as decimal values. This attribute is assigned at the organization level. This produces a plus or minus tolerance of acceptability. For example, if the allowable transaction quantity deviation for the item is 10 percent lower
than the established conversion, you would enter 10 in this field.
事务处理
对于beef这个物料，defaulting我们设置成了'No Default'，所以需要手工输入次计量单位数量，100 Lbs（即Pounds） = 45.35924 KG，我这里就输入45.35924到Secondary Qty里。
然后修改Secondary Qty到50，提示“The quantity entered is higher than the allowed deviation for the item. Please re-enter.”，这是因为,(50 - 45.35924) / 45.35924 = 10.2%，超过了10%误差(Deviation)。
如果把Secondary qty修改成47就不会报上边的提示。这是因为,(47 - 45.35924) / 45.35924 < 10% 误差(Deviation)。
查询库存现有量
报表中的UOM
但是对于很多标准report，现在还只是显示Primary UOM/Qty,不知道以后会不会把Secondary UOM/Qty加到报表中去。
Inventory Value Report
Inventory Quantity Summary Report
