abstract = "Estimating effort is a very important task in any
organization. Significant over or under-estimates can
be very expensive for software project companies. The
use of computing intelligence methods has been recently
proposed for software development effort estimation. In
this study, we present new models to estimate the
effort required for the development of software
projects. These new models were calculated using Linear
Genetic Programming (PGL). The results show that the
proposed models get more precise and more effective
estimation for Mean Magnitude Relative error (MMRE) and
Mean Magnitude of Relative Error relative to the
Estimate (MMER) than using the constructive cost model
(COCOMO). We performed the study based on three stages
according to the type of project. The models were
designed and validated by simulation with the public
repository dataset COCOMO81 and NASA93. Performance of
the proposed models EE_PGLa, EE_PGLb and EE_PGLc are
more accurate than COCOMO.",