
466 ◾ Software Metrics
where a is the average normalized length of variables (where “length of vari-
able” is the number of characters in a variable), b is the number of lines
containing statements, and c is McCabe’s cyclomatic number. The formula
was derived using regression analysis of data about subjective evaluation of
readability (De Young and Kampen 1979).
10.5 SECURITY MEASURES
We want to be able to use soware systems without fear that external
attackers will hijack our computers, data les, passwords, and/or accounts.
Soware security measures can potentially indicate the relative level of
security of computer systems from various ...