Bidirectional Influence of Defects and Functional Size

Trudel, S., Abran, A.

This paper reports on a research project
investigating the contribution of functional size measurers to
finding defects in requirements. In previous experiments, the
concurrent inspection of the same requirements document by a
measurer in addition to inspectors showed that the functional
size measurement activity adds value in finding functional
defects that inspectors have not identified. This paper presents
an analysis of the influence of defects on the functional size
once many of the identified defects have been fixed. For these
experiments, the measurers used COSMIC – ISO 19761 to
measure functional size and to find defects. Experiments
findings show an increase in functional size and a decrease in
defects identified.