Requirements and Stock Sorting 
You use the requirement sorting rule to sort requirements at order and schedule line levels, and thus override the original sequence in which the orders were placed. The orders are sorted in a different sequence to meet your requirements. The new sequence forms the basis for allocation.
You can use the stock sorting rule to specify the sort order in which stock is allocated. For example, you can use the stock sorting rule if you want stock in one storage location to be given a higher priority for allocation than stock in another location.
Prerequisites
You have assigned a sort rule for each allocation type.
Features
The sorting rule contains a field catalog with sort fields. You choose the fields from the field catalog that are important for your business processes and put them in a sequence. You can then compare the selected fields with constants. For example, you can define that customer X always has the highest priority.
Requirement Sort Rule
You can use the requirement sort rule to decide the sequence in which customers receive the requirement quantity. This rule enables you to use your own criteria and priorities to restructure the original sequence in which the requirements records are posted in the system. The following requirements types are available:
You can create a requirement sort rule in Customizing under 
Logistics - General 
SAP Fashion Management Order Allocation Run (ARun) Online ARun Sorting Maintain Rules to Sort Requirements 
. The fields used for sorting are specific to a sales order, STO, or both and are derived from the DocType column in the table.
Stock Sort Rule
You can use the stock sorting rule to specify the sort order in which stock is allocated
You create a stock sort rule in Customizing under Logistics - General SAP Fashion Management Order Allocation Run (ARun) Online ARun Sorting Maintain Rules to Sort Stock .
Example
You select the Stock Type (FSH_BSKZ) as a stock sort field, but you want to assign individual priorities to each stock type as follows.
Constants | Priority | Field Text |
|---|---|---|
B | 1 | Purchase Orders |
C | 2 | Batch Stock |
L | 3 | Shipping Notifications |
This kind of sorting would not be possible with a normal ascending or descending sort method. However, by assigning individual priorities to each stock type, you can adjust the sort order to meet your needs.