Measurement of Package-changeability by Mining Change-history

During the development of object-oriented software system; huge amount of software-development data especially change-history is stored in software-repositories. This change-history can be mined to measure the quality of the software systems. In this paper, we present change-history based package-changeability measures namely; a) Package Change-Proximity, b) Change-Coupling Index and c) Package-Changeability. These measures are defined and computed on the basis of change-coupling among packages. A case study has been performed and findings derived from the results are discussed. Our results show that these package-changeability measures can be very helpful for development team to predict and quantify the change-coupling among packages.