Settings for Assemble-to-order 
Setting the Planning Strategy for Assemble-to-order
If you want to use assemble-to-order, you must select a planning strategy that allows it. In the standard SAP system, separate planning strategies or strategy groups and requirements classes are supplied for each of the three procurement elements (production order, planned order, network), and each one contains all the necessary settings, such as the assembly type or the order type for the production order. For more information on planning strategies, strategy groups and requirements classes, see Planning Strategies.
The strategy group is assigned to the material in the material master record.
Changes to the settings for assemble-to-order are made in the appropriate requirements classes in Customizing for Sales and Distribution (in the step Define requirements classes). The following parameters are relevant for assemble-to-order:
· Assembly type
The assembly type (indicator A) determines:
¡ Which procurement element is created
¡ Whether a 1:1 link exists between the sales order and the procurement element (static procedure) or whether a loose link exists with the option of splitting dates and quantities (dynamic procedure).
· Order type
You have to enter the order type for production orders, process orders, networks/projects (not for planned orders). For more information here, please refer to the sections entitled, Assemble-to-order with Variant Configuration and Special Settings for Production Orders.
· Availability check at component level
You use the indicator CA (Component availability check) to set whether the availability check is to be carried out at component level when creating the assembly order. If you do not make this setting, the availability check is only carried out for the finished product.
· Type of component availability check
With the indicator Av (SD availability check), you determine whether the component check is to be carried out according to ATP logic or as a check against planned independent requirements. If you want to carry out the check against planned independent requirements, there are also other settings to be made. For more information here, please refer to the section entitled, Availability Check in Assemble-to-order.
· Displaying missing parts overview
You use the indicator Dia (Dialog assembly), to determine whether the system is to display a list of missing parts with information on calculated quantities and dates, that is, the components that are not fully available. You can also use this indicator to control whether the quantities and dates of the selected components can be processed interactively in the sales order.
· Checking scheduling and capacity data
You use the indicator Cap (Capacity available) to determine whether the system is to carry out lead time scheduling for the procurement element when creating the sales order or whether capacity planning is to be carried out for the procurement element when creating the sales order.
· Updating the sales order when changing the procurement element
You use the indicator No update to determine whether changes to the procurement element are to be passed on to the sales order, that is, whether the changes to the procurement element influence the committed quantities or dates in the sales order.
If you want to make other settings (for example, if you want to select the assembly type for dynamic processing), proceed as follows:
...
1. Copy the existing requirements class to a new requirements class and change the appropriate entries (Customizing).
2. Create a new requirements type and assign the new requirements class to it.
3. Create a new strategy and assign the new requirements type to it.
4. Create a new strategy group and assign the new strategy to it.
Settings for Components
If you want to carry out the availability check at component level, you must maintain the following indicators for every component to be checked in the material master record:
· The availability check must be allowed and switched on. To do this, enter the appropriate checking group in the field entitled, Availability check (MRP 2 screen). Here, you can also switch off the availability check for low-value or uncritical components.
· The indicator Indiv./collective (MRP 2 screen) must be set to Collective requirements. Otherwise, the system automatically creates a separate stock segment for each component if the requirement quantities of the higher-level assembly are also to be planned individually.
Over and above these general settings, you can also make several specific settings per procurement element.
For more information on the special settings of each procurement element, see:
Special Settings for Production Orders
Special Settings for Planned Orders
Special Settings for Repetitive Manufacturing
Special Setting for Variant Configuration