PREDICTING SOFTWARE MAINTENANCE TYPE, CHANGE  IMPACT, AND MAINTENANCE TIME USING MACHINE  LEARNING ALGORITHMS

SAMUEL, TEMESGEN YIMER

dc.contributor.author	SAMUEL, TEMESGEN YIMER
dc.date.accessioned	2022-11-17T11:57:42Z
dc.date.available	2022-11-17T11:57:42Z
dc.date.issued	2022-08
dc.identifier.uri	http://ir.bdu.edu.et/handle/123456789/14448
dc.description.abstract	Software development is the process of developing a certain system by following different steps, which are usually called software development life cycles. In each phase/step, there may be a change in artifacts. Changes that are accepted by the change approval board go to the next maintenance process. Implementing changes is difficult and expensive because most of the time modules and artifacts in previous versions are not the same as in newer versions. In addition, changes usually cause impacts on other modules and artifacts. Due to the impact of the change, the time required to implement changes also varied and became high. The type of maintenance, the impact of changes, and maintenance time can be determined by analyzing software repository data such as issue descriptions, the issue's created and resolved dates, personnel assigned to resolve the issue, and a list of affected versions. But the selection of the important software repositories and extracting the relevant information from those repositories is a challenging task. Some research has been done previously using software repositories to support maintenance types, analyzing the impact of the change and maintenance time. But the research focuses on single maintenance tasks and specific software types, so the generality of the studies is in question both in maintenance tasks and software types. In addition to this limited amount of data, only version history data was used. So, in this research, we extracted relevant information from software repositories using different extraction methods such as PyDriller. A linear support vector classifier, random forest, logistic regression, LSTM, Bi-LSTM, and other machine learning algorithms are applied to predict maintenance types and change impacts. An artificial neural network is used to estimate maintenance time. The result of the experiment shows that random forest and LSTM performed better, with an accuracy of 94% and 95%, respectively. Other machine learning algorithms have dependable performance as well. The mean squared error of the artificial neural network algorithm is 0.0028. According to Pearson’s and Spearman’s correlation analysis results, maintenance type and maintenance time show a positive correlation, while change impact shows a negative correlation both with maintenance type and maintenance time. Keywords: - Software development, change impact, software repositories, maintenance tasks, PyDriller	en_US
dc.language.iso	en_US	en_US
dc.subject	FACULTY OF COMPUTING	en_US
dc.title	PREDICTING SOFTWARE MAINTENANCE TYPE, CHANGE IMPACT, AND MAINTENANCE TIME USING MACHINE LEARNING ALGORITHMS	en_US
dc.type	Thesis	en_US