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- ZeitschriftenartikelUnderstanding the Re-Engineering of Variant-Rich Systems: An Empirical Work on Economics, Knowledge, Traceability, and Practices(Softwaretechnik-Trends Band 42, Heft 2, 2022) Krüger, JacobMost modern software systems exist in different variants to address a variety of requirements, such as customer requests, regulations, or hardware restrictions. In this dissertation, we empirically study four closely related properties in the context of variant-rich systems, namely economics, knowledge, traceability, and practices. First, we contribute a rich dataset on the economics of (re-)engineering variant-rich systems, from which we derive the core insight that moving towards platform engineering (e.g., via more systematic clone management) is economically promising. Second, we contribute an understanding of developers memory and how to support their knowledge needs, leading to the core insight that expensive reco very activities can be mitigated by enforcing suitable documentation techniques (e.g., feature traceability). Third, we contribute insights on how different feature traces impact developers program comprehension, based on which our core insight is that feature traceabi lity should ideally be independent of configurability. Finally, we contribute a process model and recommendations on how to (re-)engineer variant-rich systems, with our core insight being that carefully planning and periodically assessing a variant-rich system helps to exploit its full potential (e.g., in terms of cost savings).
- ZeitschriftenartikelModel-Driven Development Methodology and DomainSpecific Languages for the Design of Artificial Intelligence in Cyber-Physical Systems(Softwaretechnik-Trends Band 42, Heft 2, 2022) Kusmenko, EvgenyThe development of intelligent and interconnected cyber-physical systems is an interdisciplinary challenge requiring appropriate processes, languages, and tools supporting the engineering team. In this dissertation a model-driven architecture-centric approach for intelligent CPS design is presented. The foundation of this methodology is given by the architecture description language EmbeddedMontiArc. It enables a structural decomposition of the software system under development into hierarchically organized components.
- ZeitschriftenartikelAnalyzing Code Corpora to Improve the Correctness and Reliability of Programs(Softwaretechnik-Trends Band 42, Heft 2, 2022) Patra, JibeshThe goal of the dissertation summarized here is to use program analysis and novel learning-based techniques to alleviate some of the challenges faced by developers while ensuring the correctness and reliability of programs. We focus on dynamically typed languages such as JavaScript and Python for their popularity and present six approaches that leverages analysis of code corpora in aiding to solve software engineering problems. We use static analysis to generate new programs, to seed bugs in programs, and to obtain data for training neural models. We present an effective technique called Generalized Tree Reduction algorithm (GTR), to reduce arbitrary test inputs that can be represented as a tree, such as program code, PDF files, and XML documents. The efficiency of input reduction is increased by learning transformations from a corpus of example data.
- ZeitschriftenartikelEvidence-driven Testing and Debugging of Software Systems(Softwaretechnik-Trends Band 42, Heft 2, 2022) Soremekun, EzekielThis article is a summary of the dissertation titled “Evidence-driven Testing and Debugging of Software Systems” submitted in April, 2021 for the degree Doctor of Engineering (Dr.-Ing.) in Soft ware Engineering at the Faculty of Mathematics and Computer Science, Saarland University, Germany. This dissertation proposes an evidence-driven approach to address several challenges in software testing and debugging. This work provides several empirical data and methods to guide researchers to build and evaluate testing and debugging aids. We have proposed a hybrid approach that synergistically combines the strengths of dynamic slicing and statistical debugging.
- ZeitschriftenartikelBuilding Transformation Networks for Consistent Evolution of Interrelated Models(Softwaretechnik-Trends Band 42, Heft 2, 2022) Klare, HeikoIn model-driven development, models and constitute central units of the development process, from which also parts of the program code can be derived. A common means to preserve consistency between models are transformations, which adapt the other models after one of them was changed. Existing research is focused on bidirectional transformations that preserve consistency between pairs of models. Actual software systems are, however, usually described with more than two models, and the languages used to specify them vary between projects. In this thesis, we research how developers can combine multiple transformations to a network that is able to execute these transformations in an order such that all resulting models are consistent. We consider the problem from a software engineer’s perspective and make the central assumption that each transformation between two languages is developed independently and that the transformations are not and cannot be aligned with each other, in order to support independent development and reuse. We base mathematically founded as well as empirical considerations from case studies on these assumptions. Our contributions are separated into those concerning the correctness and those concerning the optimization of quality properties of such a combination of transformations to a network.
- KonferenzbeitragMessung und Bewertung der Ergebnisse eines UI-Reengineerings im Bereich der Betreuung von demenzerkrankten PersonenStaab, Sergio; Martin, LudgerGegenstand der hier vorgestellten Arbeit ist die automatisierte Analyse der Benutzungsoberflächen einer Informations-, Abstimmungs-, Kommunikations- und Dokumentationsplattform für Pflegekräfte von demenzkranken Patienten. Die Analyse erfolgt über ein eigens entwickeltes Analysetool, welches auf vier unterschiedlichen Analyseverfahren aufbaut. Mittels Performance-, Nutzerinteraktions-, Aufwandsbasierter und Reaktionsanalyse werden Anforderungen und Probleme analysiert, die sich bei der Interaktion der Pflegekräfte mit der digitalen Betreeungsdokumentation ergeben. Darauf folgt ein Software-Reengineering der Betreuungsdokumentation zur Qualitäts- und Akzeptanzsteigerung für das Pflegepersonal. Des Weiteren werden die vorherigen Erkenntnisse mit der überarbeiteten Benutzungsoberfläche gegenübergestellt und das Konzept der Dialoggestaltung gebrauchstauglicher Systeme im Kontext der Pflege um den Grundsatz der Ambientefreiheit von Objekten erweitert.
- KonferenzbeitragA Bayesian Update to Software Quality ModelingHärtel, Johannes; Lämmel, RalfSoftware reengineering profits from quantitative definitions of software quality. Such definitions are often given in terms of software quality models. We show a Bayesian reformulation of an established software quality model (logistic regression model for defects), in particular, of a software defect model. We evaluate correspondence of the results, and show an acceptable computation overhead of the Bayesian model. We argue on why the Bayesian version may be an improvement, discussing its definition and the representation of results. We focus on modeling the quality of defect proneness. Methodological insights can be transferred to other qualities.
- ZeitschriftenartikelImproving Real-World Applicability of Static Taint Analysis(Softwaretechnik-Trends Band 42, Heft 2, 2022) Luo, LinghuiSecurity breaches happen on a daily basis and are a serious threat to our society. Security incidents do not only cost a significant amount of money and company reputation, but can also be a threat to national security. Static taint analysis is a program analysis technique that can be used to prevent a wide range of security vulnerabilities and detect malicious software. This dissertation focuses on improving the real-world applicability of static taint analysis. It addresses three existing problems that hinder the real-world adoption of static taint analysis.
- KonferenzbeitragMigration des SüdLeasing COBOL-Kernbanken-Systems nach JAVA mit einem iterativ-inkrementellen AnsatzMaleika, Michael; Seek, SebastianAnfang 2019 hat die SüdLeasing GmbH, eine der führenden herstellerunabhängigen Leasing Gesellschaften in Deutschland mit 21 Standorten, das Projekt „Technisches Reengineering Bestandssystem LEASCO“ begonnen. Ziel war es, die Programmiersprache COBOL zu ersetzen und ein zukunftsfähiges System zu erhalten – Unter Einbehaltung sämtlicher Qualitätsvorgaben in einem agilen Projekt. Der folgende Beitrag geht insbesondere auf die Organisation des Gesamtvorgehens ein und spart die technischen Details der eigentlichen Migration von COBOL nach Java aus.
- ZeitschriftenartikelErnst Denert Software-Engineering-Preis 2021(Softwaretechnik-Trends Band 42, Heft 2, 2022) Felderer, Michael; Hasselbring, Wilhelm; Koziolek, Heiko; Lilienthal, Carola; Matthes, Florian; Prechelt, Lutz; Reussner, Ralf; Rumpe, Bernhard; Schaefer, InaVorwort zum Ernst Denert Software-Engineering-Preis 2021