  The need to update the calibration of Function Point (FP) complexity weights
is discussed, whose aims are to fit specific software application, to reflect
software industry trend, and to improve cost estimation. Neuro-Fuzzy is a
technique that incorporates the learning ability from neural network and the
ability to capture human knowledge from fuzzy logic. The empirical validation
using ISBSG data repository Release 8 shows a 22% improvement in software
effort estimation after calibration using Neuro-Fuzzy technique.
