Determining the Requirements Type
确定需求类型
A requirements type contains the control parameters to plan and consume planned independent requirements and customer requirements. Different requirements types or combinations of requirements types from planned independent requirements and customer requirements are defined for each planning strategy.
需求类型包含计划和消耗计划独立需求和客户需求的控制参数。计划独立需求和客户需求中的不同的需求类型或需求类型组合被定一在每一个计划策略中。
You do not have to define any new strategies. SAP’s standard delivery provides you with all strategies described in this document. There are only a few cases where you should define your own planning strategies.
你不需要定义任何新的策略，SAP的标准版本提供了所有在本书中描述的策略。只有在极少的情况下，你可能需要定义你自己的计划策略。
Activities 作业
If you want the system to determine the requirements type when automatically creating the planned independent requirements, enter strategy groups for the corresponding materials in the material master record. If the strategy group allows a number of planning strategies, the system proposes the requirements type from the main strategy. You can overwrite this strategy in the sales order using one of the alternative requirements types in the Overview ->Procurement screen.
在你自动创建计划独立需求，在物料主数据中输入相关物料的策略组时，如果你要求系统去决定需求类型。如果策略组允许几种计划策略，系统会建议主策略中的需求类型。你可以在销售订单中使用替代需求类型去覆盖这个策略，替代需求类型在Overview ->Procurement页中。
Assigning a Planning Strategy via the MRP Group
通过MRP组分配计划策略
You can also assign the planning strategy with the MRP group.
你也可以通过MRP组来分配计划策略。。
1. Assign the strategy group to the MRP group (in Customizing for Demand Management, choose Planned Independent Requirements ->Planning Strategy ->Assign strategy group to MRP group).
分配策略组到MRP组 (TCODE: OPPU)。
The MRP group is assigned to the material in the material master record.
在物料主数据中分配MRP组到物料。
2. If you have entered a strategy group or an MRP group containing the appropriate strategies in the material master record, you do not have to enter a requirements type in Demand Management.
如果你的物料主数据中的策略组或MRP组中包含了正确的策略，在需求管理中你就不需要再输入需求类型了。
The system determines the valid requirements type with the strategy group from the material master record and automatically proposes this type when creating independent requirements (or customer requirements). If the strategy group contains more than one planning strategy, the system proposes the requirements type of the main strategy. If necessary, you can overwrite this proposal using one of the requirements types from the alternative strategies.
系统使用物料主数据中的策略组来确定有效的需求类型，并且在你创建独立需求（或客户需求）自动建议这个需求类型。如果策略组包含多个策略组，系统使用主策略的需求类型。如果需要你可应从替代策略中使用需求类型来覆盖建议的需求类型。
In order to find the correct requirements type in demand management and in sales order management, you have to:
为了使需求管理和销售订单能正确地找到需求类型，你必须：
Assign the strategy groups to the MRP groups, and
给MRP组分配一个策略组，并且
Assign the MRP groups to every material to be planned in the material master record.
在物料主数据中，把这个MRP组分配给每一个要计划的物料。
PS. 这个过程是在作需求管理或销售订单中，策略组由关联的MRP组带出来，需求类型则由策略组带出来 @?
Or 或者
Enter the strategy group directly in the material master record of the material to be planned
在要计划的物料的物料主数据中，直接一个策略组。
PS. 即策略组乃是必须的。