
112 ◾ Software Metrics
predict eort. is approach can be rather unsatisfactory, since predicting
size may be just as hard as predicting eort. In addition, the number of
source statements captures only one specic view of size. In Chapter 8, we
propose several ways to address these problems.
3.3.2 Productivity Measures and Models
To analyze and model productivity, we must measure a resource attribute,
namely the number of personnel (either as teams or individuals) active
during particular processes. e most commonly used model for produc-
tivity measurement expresses productivity as the ratio “process output
inuenced by the personnel” d ...