Period-Based Budgeting 
Use
Period-based budgeting deals with supplementary functionality in the Budget Control System which enables you to:
control which periods of a given fiscal year are open and which are closed
control which funds are managed according to the period settings made
Integration
Period-based budgeting is fully integrated with the Funds Management BCS functionality.
Prerequisites
In order to do period-based budgeting, you must first have activated period control in Customizing (IMG menu path
Funds Management Government
Budget Control System (BCS)
Control Budgeting Flow
Activate Period Control 
.
Note
If period control is not activated here – that is, if you have not made any entries – the default setting defines that all periods are open for budgeting.
Activities
After carrying out the IMG activity under
Prerequisites
above, go to the Public Sector main menu
Funds Management
Additional Functions
Closing Operations
Open and Close Periods/Fiscal Years
Budget (BCS)
Individual Processing
(Transaction FMOPER) and maintain the budgeting periods for your FM area.
If you want to carry out fund-based period control, you can do so here as well. In this way, you can open and close periods for specific funds.
Note
If period control has been activated in Customizing, all periods are automatically closed until you open them using the above transaction.
Period Control and BCS Status Management
When you use period-based budgeting, BCS status management remains active in parallel. SAP recommends that you use the two functions in the following way:
Period-based budgeting to control which period is open for budget changes in general. It therefore provides a period-based view of your budgeting data.
Status management to control the combination of budget process and budget type to be used during a certain phase of the budget cycle. Status management provides a process-oriented view of the same data.