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This technical briefing provides an overview of how quantitative empirical research methods can be combined with qualitative ones generating the family of empirical software engineering approaches known as mixed-methods. The ultimate aim of such mixed-methods is supporting cause-effect claims combining multiple data types, sources and analyses that provide software practitioners and academicians solid...
A novel approach of a testbed for embedded networking nodes has been conceptualized and implemented. It is based on the use of virtual nodes in a PC environment, where each node executes the original embedded code. Different nodes are running in parallel and are connected via so-called virtual interfaces. The presented approach is very efficient and allows a simple description of test cases without...
Background: Due to tight scheduling and limitedbudget, it may not be possible to resolve all the existing bugsin a current release of a software product. The accumulation ofthe deferred bugs in the issue tracking system are obligations (liabilities) of the software team similar to financial analogyof 'debt'. Defect debt is known as latent defects which arenot resolved in the current release. Aim:...
Build systems play a crucial role in modern software engineering. Recent studies have shown that many builds fail, mostly due to neglected maintenance. This blocks teams from continuing the development and costs time and resources to fix. The target of the thesis is to reduce build breakage by investigating changes that lead to failing builds, identifying bad and best practices for build configuration,...
In conventional large-scale networks, creation and management of network services are costly and complex tasks that often consume a lot of resources, including time and manpower. Network softwarization and network function virtualization have been introduced to tackle these problems, aiming at decreasing costs and complexity of implementing new services, maintaining the implemented services, and managing...
Researchers often focus on the development process and the final product (source code) to investigate and predict software defects. Unfortunately, these models may not be applicable to software projects in which there is no access to the data sources regarding development process. For example, in cases when a company conducts tests on behalf of its business contractors, it is only possible to evaluate...
Code coverage is a metric used to represent how much code is tested when particular test cases are executed. As is code coverage, specification coverage is expected to help us to comprehend how much specification to be implemented is tested. In this study, we propose a visualization process for specification coverage. This process finds traceability links between specifications and test cases using...
Refactoring is a well-known technique that is widely adopted by software engineers to improve the design and enable the evolution of a system. Knowing which refactoring operations were applied in a code change is a valuable information to understand software evolution, adapt software components, merge code changes, and other applications. In this paper, we present RefDiff, an automated approach that...
Exception handling allows developers to deal with abnormal situations that disrupt the execution flow of a program. There are mainly three types of exceptions: standard exceptions provided by the programming language itself, custom exceptions defined by the project developers, and third-party exceptions defined in external libraries. We conjecture that there are multiple factors that affect the use...
We would like to present the idea of our Continuous Defect Prediction (CDP) research and a related dataset that we created and share. Our dataset is currently a set of more than 11 million data rows, representing files involved in Continuous Integration (CI) builds, that synthesize the results of CI builds with data we mine from software repositories. Our dataset embraces 1265 software projects, 30,022...
A main difficulty to study the evolution and quality of real-life software systems is the effect of moderator factors, such as: programming skill, type of maintenance task, and learning effect. Experimenters must account for moderator factors to identify the relationships between the variables of interest. In practice, controlling for moderator factors in realistic (industrial) settings is expensive...
Test case maintainability is an important concern, especially in open source and distributed development environments where projects typically have high contributor turn-over with varying backgrounds and experience, and where code ownership changes often. Similar to design patterns, patterns for unit testing promote maintainability quality attributes such as ease of diagnoses, modifiability, and comprehension...
The paper describes a new system for remote access to measurement workplaces. The system has a modular structure, when two modules called GO and DO module are matched for remote operation. The GO module distributes measured data over a network. The workplace is managed by DO module. The designer of a new workplace develops only the DO module. Our modular system simplifies and unifies the design of...
The evolution rate of mobile applications is much higher than regular software applications having shorter release deadlines and smaller code base. Mobile applications tend to be evolved quickly by developers to meet several new customer requirements and fix discovered bugs. However, evolving the existing features and design may introduce bad design practices, also called code smells, which can highly...
Researchers perform empirical studies in industry to gain qualitative insights into a real-world problem. However, common critics are the diversity and selection process of participants. To address these issues, we propose to improve the integration of question-answering systems into empirical study. In this paper, we i) describe approaches to conduct studies in such systems, ii) exemplify corresponding...
The amount of software in modern vehicles is constantly growing. However, the risk for functional and quality deficiencies increases simultaneously with size. This results in industry for example in inevitable and unexpected refactorings of software models, which is slowing down development processes in turn. In this industrial case study, we evaluate model growth predictors applied to foresee critical...
Background Software systems are relying more and more on multi-core hardware requiring a parallel approach to address the problems and improve performances. Unfortunately, parallel development is error prone and many developers are not very experienced with this paradigm also because identifying, reproducing, and fixing bugs is often difficult. Objective The main goal of this paper is the identification...
Context: Comparative study of software development methodologies in millenials high school students. Objective: This paper compares the performance and satisfaction of both students and teachers in using two development strategies in a K-12 Computer Science teaching practice. Method: This study includes an experiment, administered in a laboratory controlled setting to measure students' performances...
Open-source projects rely on attracting new and retaining old contributors for achieving sustainable success. One may suspect that adopting new development practices like Continuous Integration (CI) should improve the attractiveness of a project. However, little is known about the impact that adoption of CI has on developer attraction and retention. To bridge this gap, we study how the introduction...
There is no metric that determines how well the implementation of a ticket has been tested. As a consequence, code changed within the context of a ticket might unintentionally remain untested and get into production. This is a major problem, because changed code is more fault-prone than unchanged code. In this paper, we introduce the metric ticket coverage which puts test coverage into the context...
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