Function Points

Input: data entering the system.
Output: data leaving the system.
Inquiries: data queries.
Files: Data manufactured and stored within the system.
Interface: Data maintained in a different system.

An analysis metric used to [see page 9, measure] the functionality delivered by a system from the point of view of the user.

Function points [see page 10, define] the following components:

These are then [see page 13, combined] together to get a quantitative measure of system functionality.