What is Empirical Model?

What is Empirical Model?

Empirical models are statistical models and are based upon historic data. Although there are many different models developed by different researchers, all of them share the following basic structure:
E = A + B * (eV) ^C
Where A, B, c are empirical constants,
‘Ev’ is the effort in terms of lines of code or FP, and
‘E’ is the effort in terms of person months.