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Auflistung nach Autor:in "Liebel, Grischa"

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  • Konferenzbeitrag
    Industrielle praxis modellbasierter entwicklung im bereich eingebetteter systeme
    (Software-engineering and management 2015, 2015) Liebel, Grischa; Marko, Nadja; Tichy, Matthias; Leitner, Andrea; Hansson, Jörgen
    Modellbasierte Entwicklung (MBE) ist eine verbreitete Entwicklungsmethode, die die Produktentwicklung verbessern sol . Es existieren nur wenige empirische Untersuchungen in Bezug auf MBE für eingebet ete Systeme. Daraus motiviert sich unsere Umfrage zur industriellen Praxis in diesem Bereich. Die Umfrage beinhaltete neben demographischen Fragen, auch Fragen zu den angewandten Sprachen und Werkzeugen, den Gründen für die Einführung von MBE, den positiven und negativen Auswirkungen, sowie Problemen bei der Nutzung.
  • Konferenzbeitrag
    LoCo CoCo
    (Software Engineering und Software Management 2018, 2018) Mohamad, Mazen; Liebel, Grischa; Knauss, Eric
    We aim to discuss our recent publication in the Information and Software Technology (IST), DOI: 10.1016/j.infsof.2017.08.002. Context: Communication and coordination are essential ingredients to successful requirements and software engineering. However, especially in large organisations, it is difficult to establish and maintain communication channels. Objective: In order to facilitate communication, we investigate automatic construction of social network models from existing requirements and systems engineering models. Method: We conducted a design science research study in three iterative cycles at a large automotive company, and evaluated the outcome based on 15 interviews with practitioners and a survey with 12 participants. Results: The resulting approach, denoted LoCo CoCo, automatically creates and visualises social networks based on selected systems engineering components of real-life, productive systems engineering models. Our results indicate that automatic construction and visualisation of social network models could be feasible and useful to overcome existing communication challenges. Conclusion: Despite a lack of quality in existing social data at the case company, practitioners found LoCo CoCo potentially helpful to overcome existing communication challenges. Additionally, the visualisation could trigger practitioners to keep their social data up to date.
  • Konferenzbeitrag
    Model-Driven Software Engineering in the openETCS Project: Project Experiences and Lessons Learned
    (Software Engineering 2017, 2017) Karg, Stefan; Raschke, Alexander; Tichy, Matthias; Liebel, Grischa
    Model-driven software engineering in industrial practice has been the focus of different empirical studies and experience reports. Particularly, positive effects of model-driven software en- gineering have been reported in the domain of embedded and safety-critical systems. We report in this paper on the experiences of the openETCS European research project whose goal was to formal- ize the System Requirements Specification and to develop an open source reference implementation of the European Train Control System including open source modeling tools. Furthermore, we will discuss lessons learned, e.g., about using open source modeling toolchains in safety-critical contexts and about using the SCADE Suite for the development of the safety-critical parts.
  • Konferenzbeitrag
    Requirements Engineering Challenges in Large-Scale Agile System Development
    (Software Engineering und Software Management 2018, 2018) Kasauli, Rashidah; Liebel, Grischa; Knauss, Eric; Gopakumar, Swathi; Kanagwa, Benjamin
    We aim to discuss our recent publication at the International Conference on Requirements Engineering 2017 in Lisbon, Portugal. Motivated by their success in software development, companies implement agile methods and their practices increasingly for software-intense, large products, such as cars, telecommunication infrastructure, and embedded systems. As a consequence of safety and regulative concerns as well as different development cycles of hardware and software, detailed, up-front requirements engineering (RE) can be at odds with agile (software) development. We present results from a multiple case study with two car manufacturers, a telecommunications company, and a technology company that are on the journey to introduce organization wide continuous integration and continuous delivery to customers. Based on 20 qualitative interviews, 5 focus groups, and 2 cross-company workshops, we discuss possible scopes of agile methods within system development, the consequences this has on the role of requirements, and the challenges arising from the interplay of RE and agile methods in large-scale system development. These relate to communicating and managing knowledge about a) customer value and b) the system under development. Better alignment of a holistic requirements model with agile development practices promises rich gains in development speed, flexibility, and overall quality of software and systems.