A System for Measuring Function Points from an ER-DFD Specification

Lamma E., Mello P., Riguzzi F.

We present a tool for measuring the Function Point (FP) software metric from the specification of a software system expressed in the form of an Entity Relationship (ER) diagram plus a Data Flow Diagram (DFD). First, the informal and general FP counting rules are translated into rigorous rules expressing properties of the ER-DFD. Then, the rigorous rules are translated into Prolog. The measures given by the system on a number of case studies are in accordance with those of human experts.