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Auflistung nach Autor:in "Ringwelski, Georg"

1 - 4 von 4
  • Konferenzbeitrag
    BestBasket, an Application for Efficient Indirect e-Procurement in Small and Mid-size Businesses
    (INFORMATIK 2008. Beherrschbare Systeme - dank Informatik. Band 2, 2008) Ringwelski, Georg
    The Internet opens up new markets for businesses and can thus allow for a significant improvement in procurement. However, this will only apply if the cus- tomers are able to handle this huge market. In this paper we show that finding optimal suppliers in B2B marketing is a complex combinatorial problem and present a solution to it. The BestBasket system of Mercateo.com helps customers to handle the problem and to easily manage their procurement in an optimal way. The system is used by 1100 customers each day and 35% of them accept the optimized supplier-porfolio computed by the system. This makes up an overall relevant market of e 150 billion per year in Germany.
  • Konferenzbeitrag
    Evaluating a practical decision support system from a usability perspective
    (INFORMATIK 2011 – Informatik schafft Communities, 2011) Dillan, Steve; Prenzel, Anna; Ringwelski, Georg
    If optimization software creates better solutions than any other available product it doesn't imply that users are willing to use this product. The user has to be part of the software development process to guarantee the acceptance of the final product. This paper describes our approach to achieve this critical success factor of an industrially used decision support system.
  • Konferenzbeitrag
    Nine interaction guidelines for the design of human computer interaction in detailed scheduling systems
    (Informatik 2014, 2014) Prenzel, Anna; Ringwelski, Georg
    With the help of modern software, the scheduling process in many fields can be automated nearly completely. However, these systems often provide insufficient interaction possibilities for the scheduler to incorporate his own expert knowledge. Finding and implementing suitable planning decisions is often a time-consuming and error-prone process that is not supported by the computer. This deficiency can impair the practicability of the schedules and hence the benefit of the planning system considerably. In this paper, we deduce 9 interaction guidelines that form a concept for the design of human-computer-interaction in scheduling systems. Unlike approaches that extend general HCI guidelines we derive the rules from recent research on human decision making. From that perspective we define computer support for both the formation and the implementation of planning decisions by the scheduler. The results of a user test show that the concept allows an effective incorporation of the human scheduler. Furthermore the concept can be applied to any detailed scheduling problem.
  • Konferenzbeitrag
    Statistical evaluation of the usability of decision-oriented graphical interfaces in scheduling applications
    (INFORMATIK 2012, 2012) Prenzel, Anna; Ringwelski, Georg
    In this paper, we present the results of a usability study in interface design for scheduling systems. We show that providing possibilities to interactively create schedules improves the quality of decision making. The considered ways of interaction are tailored to the needs of human schedulers. They facilitate and optimize planning decisions at all stages of the scheduling procedure. Based on a study with 35 test subjects and overall 105 hours of usability testing we verify that the use of some features improves both quality and practicability of the produced schedules.