In this study, we present a window-based exponential
effort estimation model to predict the effort required in terms of man
days by using Unadjusted Function Point (UFP) size measure and eliminate
the usage of General Systems Characteristics (GSCs). A very comprehensive
statistical analysis and test was carried out on large amount of quality
project data in the International Software Benchmarking Standard Group
(ISBSG) Release 9 dataset, which were collected by the International Function
Points User Group (IFPUG) count approach in the process of model development.
The effectiveness of the model was examined and reported in this study.