
162 ◾ COSMIC Function Points: Theory and Advanced Practices
© 2011 by Taylor & Francis Group, LLC
noted that the layer identication is an iterative process. e exact layer will be
rened as the mapping process progresses.
After identifying the software layers, the measurer must identify the boundary
of each piece of software. According to the COSMIC FFP manual (ISO 2002a),
the boundary is dened as a conceptual interface between the software under mea-
surement and its users (human beings, engineered devices, or other software). e
boundary allows the measurer to distinguish what is included inside the measured
software from what is part of t ...