Creating Planned Independent Requirements Versions 
Use
You can create various versions of the demand program for long-term planning. These different versions of planned independent requirements are then calculated in simulative mode in Material Requirements Planning (MRP) and in Capacity Planning. You assign a version number to each planned independent requirements version. The system uses these version numbers to differentiate between these simulative versions and the operative version of the demand program.
Integration
The aim of long-term planning is to check and adjust the planning results created using the simulative versions of the demand program.
Once you have checked the results, you activate the appropriate simulative versions which converts them into operative versions. This means that the versions planned in long-term planning can either complement operative versions or they can replace them entirely within a specified period.
Prerequisites
In Customizing for Demand Management, in the workstep Define Version Numbers, you must create the version numbers for the different simulative demand programs you want to create.
Features
You can either create new versions of planned independent requirements for long-term planning or you can copy existing planned independent requirements (from operative planning, for example) to a simulative version number. A special report is available for copying existing versions.