You are using the Check Availability feature to explore alternative ways of promising a batch...

The values for the attributes that begin with requested, such as the Requested Item attribute and the Requested Ship-from Warehouse attribute, are initially determined by what the values are when you select the line in the Order Orchestration work area. You cannot change the values for many of the requested attributes, such as the Requested Item attribute, the Requested Quantity attribute, and the Requested Ship Date attribute. You can change or clear the values for the Requested Ship-from Warehouse attribute and the Requested Shipping Method attribute. There are also some additional attributes you can change, such as whether substitutions are allowed, to influence the results when you explore other promising option.