Generation of Billing Request Items 
You can use this function to generate billing request items (BRIs) in leasing in the following ways:
Generation of BRIs from the cash flow
The flow categories used in the cash flow determine whether the system creates a BRI. You can make settings in Customizing to specify whether the system creates an individual BRI for each flow category or groups several flow categories in one BRI. The system generates the BRIs up to a given key date, which the system calculates using a date rule defined in Customizing. The system recalculates the key date periodically for the remaining term.
Creation of BRIs from the condition types of the financing item
If you have entered a financing item in Customizing, the system generates a BRI for each condition type in the financing item using the attributes entered in Customizing. If you change the parameters of the contract (such as term or business partner), the system adjusts the BRI. If you change the classification of a financing item, a condition type can be added or deleted in the financing item. The system either creates or deletes a BRI accordingly.
Prerequisites
You have made the following settings in Customizing for SAP Customer Relationship Management (SAP CRM):
Use of different payment methods and payers/bill-to parties:
Customer Relationship Management 
Master Data Business Partner Business Agreement Define Parameters for Business Agreement Define Payment Methods 
NoteYou must configure the payment methods in SAP CRM and SAP ERP at the same time.
End of the note.
Generation of BRIs from the condition type:
Customer Relationship Management Financial Services Leasing Billing Request Items: BRI: Define Item Categories That Are Relevant for Generating BRIs
Generation of BRIs from Conditions: Define Attributes
Generation of BRIs from the cash flow:
Customer Relationship Management Financial Services Leasing Financial Mathematics Settings Define Flow Categories step: Define External Flow Categories NoteYou must use the item category for BRIs generated from the cash flow differently to the item category for BRIs generated from conditions.
End of the note.
Time horizon:
To use the time horizon function, you must define a date rule for the time horizon in Customizing for the billing plan type:
Customer Relationship Management Transactions Basic Settings Billing Plan Define Billing Plan Types NoteThe date rule must contain a baseline date and a time frame.
End of the note.
Features
Assignment of different payment methods and payers and/or bill-to parties
You can bill all payments with different flow categories (such as down payment, repayments, and interest) separately, using the different payment method and business partner. The system creates a separate BRI for each payment. The system creates the BRIs using the payment method and business partners that are assigned in the FIMA conditions.
Processing of payment methods and business partners when creating BRIs
In the FIMA conditions, you can assign different business partners (bill-to party and payer) and different payment methods. All the cash flows are assigned to the business partners. If you do not assign a payment method in the FIMA conditions, the system creates all BRIs with the same payment method. If you do not assign a business partner in the FIMA conditions, the same payer and bill-to party is used for each BRI. This means that the cash flow cannot be split across multiple business partners.
Generation of billing request items for time horizons
BRIs are generated only up to a specified key date, which is calculated using a date rule (Customizing). The key date is recalculated periodically for the remaining term as soon as the last BRI for the current period has been billed. The function then regenerates BRIs for the new period.
If you execute a change process in the leasing document that terminates a financing item, the function generates the outstanding BRIs for this item up to the effective contract end date of the item, regardless of the key date of the time horizon. This means that the validity date of the most recently generated outstanding BRI is before or the same as the effective contract end date.