A Case Study on the Conversion of Function Points into COSMIC

Some empirical studies have been carried out so far to identify a function able to convert IFPUG functional size units into the COSMIC ones. The present paper reports on a replication of those studies using a dataset of 25 Web applications. As for the estimation technique, linear regression analysis was employed, while k-fold cross validation was exploited to validate the estimation models. The results show that there is a significant correlation between the size expressed in terms of COSMIC and IFPUG, but differently from previous studies the conversion factor is not so close to 1.