Maintaining and Defining Strategies and Strategy Groups
维护和定义策略及策略组
The planning strategies represent the business procedures to plan and produce a material. In the system, the planning strategies are recorded in Customizing by a combination of requirements types from Demands and Sales Order Management. This combination determines either the consumption of planned independent requirements by customer requirements or how the availability check is to be carried out.
计划策略表示了计划和生产物料的业务处理过程。在系统中，计划策略由需求和销售订单管理联合在后台作业中定义。这种联合决定了由客户需求消耗的计划独立需求或有效性检查是怎么执行的。
The planning strategies are maintained in Customizing for Demand Management. Here, the requirements types are combined for the planning strategy. Technically speaking, the requirements types are texts that represent the planning strategy in the application (Demand Management, Sales and Distribution). The requirements type is controlled by another key—the requirements class. The requirements class contains all the control parameters required for Demand Management and Sales and Distribution. To maintain the planning strategy, you only have to combine the necessary requirements types. The corresponding requirements class is automatically assigned with all the accompanying control parameters.
计划策略维护在需求管理的后台定制作业中。在这里，需求类型被包含在计划策略中。从技术上讲，需求类型就是表示计划策略在（需求管理、销售与分销）应用中的一种文本。需求类型由另外一个关键字控制 — 需求类（Requuirements class）。需求类包含所有的为需求管理和销售与分销所需的控制参数。要维护计划策略，你只需要包含所需要的需求类型即可。相关的需求类会自动分配它所包含的控制参数。
By assigning a planning strategy to a particular material, the system determines the correct requirements type (and all the control parameters of the requirements class) when creating planned independent requirements or sales orders. To set up this mechanism, certain objects and assignments must be set up in the system. The standard system is set up so that you can perform all standard processes described in this guidebook.
通过分配计划策略到特定的物料，当创建计划独立需求或销售订单时，系统决定正确的需求类型（和所有需求类的控制参数）。为了配置这种机制，特定对象和分配必须在系统中设置。在本书中介绍了所有的标准处理流程。
The primary object for setup is the planning strategy (in Customizing for Demand Management). This strategy is defined by a requirements type from Demand Management, Sales Order Management or a logical combination of both requirements types. These requirements types determine, for example, how the consumption of planned independent requirements by customer requirements is carried out and whether the availability check according to the ATP logic also occurs.
配置的主对象是（在需求管理的后台定制中的）计划策略。策略由需求管理、销售订单管理或两者的逻辑组合的需求类型定义。需求类型决定客户需求怎么消耗计划独立需求和是否根据ATP逻辑的有效性检查。
The following assignments have to exist to assign the requirements classes to planned independent requirements and sales orders:
以下分配对计划独立需求和销售订单一定存在已分配的需求类：
Planning strategy to a strategy group (in Customizing for Demand Management) so that a material can be planned with various planning strategies.
You can maintain one main strategy and up to six alternative strategies.
（在需求管理的后台定制中）分配计划策略到策略组，以便物料能够有几个计划策略。你可以维护一个主策略和六个替代策略。
Strategy group to the material (in the material master record), so that the system can automatically determine the correct requirements type.
（在物料主数据中）分配策略组到物料，以便系统可以自动决定正确的需求类型。
A planning strategy can also be assigned with the MRP group. Assign the strategy group in Customizing for Demand Management to the MRP group. In this case, the MRP group is assigned to the material in the material master record.
一个计划策略也可以分配给一个MRP组。在需求管理的后台定制中分配策略组到MRP组。在这种情况下MRP组在物料主数据中被分配给物料。