A comparative evaluation on the accuracies of software effort estimates from clustered data

作者：Huang Sun Jen^*; Chiu Nan Hsing; Liu Yu Jen

来源：Information and Software Technology, 2008, 50(9-10): 879-888.

DOI：10.1016/j.infsof.2008.02.005

• software project management
• software effort estimation
• data clustering
• effort driver

Precision in estimating the required software development effort plays a critical factor in the success of software project management. Most existing software effort estimation models only compare the accuracies of software effort estimates from the historical data without clustering. A potential factor that can affect the accuracies of the established effort estimation models is the homogeneity of the data. However, such investigation on the effects of the accuracies of the derived effort estimates is seldom explored in software effort estimation literature. Therefore, this paper aims to explore the effects of accuracies of the software effort estimation models established from the clustered data by using the International Software Benchmarking Standards Group (ISBSG) repository. The ordinary least square (OLS) regression method is adopted to establish a respective effort estimation model in each cluster of datasets. The empirical experiment results show that the estimation accuracies do not reveal significant differences within the respective dataset clustered by each software effort driver. It also demonstrates that software effort estimation models from the clustered data present almost similar accuracy results compared to models from the entire data without clustering.

• 出版日期2008-8