Wolfgang Slany

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Generating high-quality schedules for a rotating workforce is a critical task in all settings where a certain staffing level must be guaranteed beyond the capacity of single employees, such as for instance in industrial plants, hospitals, or airline companies. Results from ergonomics [2] indicate that rotating workforce schedules have a profound impact on(More)
Designing shifts is one of the important stages in the general workforce scheduling process. In this paper we consider solving the shift design problem by using local search methods. First we propose a set of move types that give rise to a composite neighborhood relation. In the move selection process, we make use of the basic prohibition mechanisms of tabu(More)
Network design problems, such as generalizations of the Steiner Tree Problem, can be cast as edge-cost-flow problems. An edge-cost flow problem is a min-cost flow problem in which the cost of the flow equals the sum of the costs of the edges carrying positive flow.We prove a hardness result for the Minimum Edge Cost Flow Problem (MECF). Using the one-round(More)
This paper investigates how the integration of agile methods and User-Centered Design (UCD) is carried out in practice. For this study we have applied grounded theory as a suitable qualitative approach to determine what is happening in actual practice. The data was collected by semi-structured interviews with the professionals who have already worked in the(More)
Learn more in: Speech-Centric Multimodal User Interface Design in Mobile Technology. 2. Learn more in: Designing e-Business Applications with Patterns for This often involves a participatory or cooperative design approach in which to Evaluate the User Experience with Mobile Interactive Multimedia Systems. 11. Design of a Mobile Brain Computer(More)
Due to complexity reasons of realistic scheduling applications, often iterative improvement techniques that perform a kind of local search to improve a given schedule are proposed instead of enumeration techniques that guarantee optimal solutions. In this paper we describe an experimental comparison of four iterative improvement techniques for schedule(More)
The use of game thinking and game mechanics in non-gaming context is becoming more and more popular. This has been known as gamification. Recent studies have shown that this attempt seems very promising in different areas. In this paper we explore the value of gamification in a software development team. This paper describes one approach to add gamification(More)