Use
You can control number assignment for appropriation requests using the appropriation request type. There are various ways of using the appropriation request type for this purpose. Each of these methods has its own organizational requirements.
Features
You need a number range for the assignment of the appropriation request number. It is not possible to create measures for an appropriation request type, unless you assign a number range group of the appropriation request number range object to the appropriation request type.
The system displays the assigned number range group in the definition of the appropriation request type. However, you cannot maintain the number range group there.

Number Assignment for Appropriation Requests
You specify the details for the number assignment in the definition of the appropriation request type. These specifications determine how the numbers are assigned for the appropriation request, and for the measure that will be created for it later. The following options exist:
Use this option to specify that measures that are WBS elements have the same number as the appropriation request. If the number of the WBS element uses a coding mask, the system uses the same coding mask for the appropriation request. When you create the appropriation request, the system checks if there is already a project definition that has the same number, and if so, rejects your entry.
With this option, you have to use a number range with internal number assignment for the appropriation request. The number from the internal number assignment, however, is only used internally by the system. You have to assign the actual number of the appropriation request and WBS element externally.
Even though you have defined number assignment that is the same as the WBS element, you can still create orders as measures for the appropriation request. You can also manually assign additional WBS elements to the appropriation request.
Use this option to specify that measures that are internal orders have the same number assignment as the appropriation request. The appropriation request can use a number interval with internal or external number assignment. Number assignment has to be external.
You have to make sure (organizationally) that the appropriation request number is in a number interval that is also available for the order that is to be created.
You use this option when you want to create orders as measures from the master data transaction of appropriation requests. You then have to specify internal number assignment for orders, or make sure that the number of the appropriation request is available in the number range of the order.
Activities
You specify number assignment for appropriation requests in Customizing for Investment Management. Choose Master Data
® Control Data ®
Define Number Assignment.