Use
You define allocations in cycles in the FI-SL System if you want to carry out an assessment or a distribution. Every cycle consists of one or more segments. Within each segment, you define the sender and receiver for the segment, as well as the rules for allocating data.
Prerequisites
To create allocation cycles and allocation segments, choose Accounting
® Financial Accounting ® Special Purpose Ledger ® Periodic Processing ® Allocation, and then either:The system displays the FI-SL: Create <Allocation Type>: Initial Screen.

You can also enter actual data via Actual posting. (Actual posting
You can also enter plan data via Planning. (Planning
® Plan closing ® Plan assessment or Plan distribution ® Create).Procedure

The first character of the allocation name cannot be a number. If you use the same name for an allocation more than once, the allocations must have different starting dates. When allocation cycles have the same name, but different starting dates, the system processes the cycles as independent objects. In the event of a change, this allows you to keep your old cycle and to create a new cycle with the same name but a different start date. If you define cycles that have the same name, the valid period of the first cycle should normally end before the second cycle starts.
The system displays the FI-SL: Create <Allocation Type> Cycle: Header Data screen.

For more information, see:
Creating a Segment for an Allocation Cycle