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  • Articles  (170)
  • Springer  (170)
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  • Economics  (170)
  • 1
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    Blockchain (2017)
    Springer
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    Publication Date: 2017-03-21
    Electronic ISSN: 1867-0202
    Topics: Computer Science , Economics
    Published by Springer
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    Resource allocation problems in decentralized energy management (2017)
    Springer
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    Publication Date: 2017-02-14
    Description: Changes in our electricity supply chain are causing a paradigm shift from centralized control towards decentralized energy management. Within the framework of decentralized energy management, devices that offer flexibility in their load profile play an important role. These devices schedule their flexible load profile based on steering signals received from centralized controllers. The problem of finding optimal device schedules based on the received steering signals falls into the framework of resource allocation problems. We study an extension of the traditional problems studied within resource allocation and prove that a divide-and-conquer strategy gives an optimal solution for the considered extension. This leads to an efficient recursive algorithm, with quadratic complexity in the practically relevant case of quadratic objective functions. Furthermore, we study discrete variants of two problems common in decentralized energy management. We show that these problems are NP-hard and formulate natural relaxations of both considered discrete problems that we solve efficiently. Finally, we show that the solutions to the natural relaxations closely resemble solutions to the original, hard problems.
    Print ISSN: 0171-6468
    Electronic ISSN: 1436-6304
    Topics: Mathematics , Economics
    Published by Springer
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  • 3
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    Dynamic network DEA approach with diversification to multi-period performance evaluation of funds (2017)
    Springer
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    Publication Date: 2017-02-22
    Description: When analyzing the relative performance of mutual funds, current data envelopment analysis (DEA) models with diversification ignore the performance change in consecutive periods or the dynamic dependence among investment periods. This paper introduces a novel multi-period network DEA approach with diversification and directional distance function. The new approach decomposes the overall efficiency of a mutual fund in the whole investment interval into efficiencies at individual periods. At each period, mutual funds consume exogenous inputs and intermediate products produced from the preceding period to produce exogenous outputs and intermediate products for the next period to use. Efficiency decomposition reveals the time at which the inefficiency occurs. The new model can provide expected inputs, outputs and intermediate variables at individual periods, which are helpful for managers to find factors causing the overall inefficiency of a fund. Under the assumption of discrete return distributions and a proper choice of inputs, outputs and intermediate variables, the proposed models can be transformed into linear programs. The applicability and reasonability of the proposed method are demonstrated by applying it to assess the relative performance of funds in Chinese security market and European security market, respectively.
    Print ISSN: 0171-6468
    Electronic ISSN: 1436-6304
    Topics: Mathematics , Economics
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  • 4
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    Eliciting and Modeling Business Process Stories (2017)
    Springer
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    Publication Date: 2017-05-13
    Description: Most business process modeling tools used today encourage the rendition of lean, prescribed and clearly coordinated activities, which often clash with far more intricate business realities. This paper evaluates an alternative approach that adopts concepts from storytelling and sense-making theories to elicit process stories. The viability of this approach is tested in a case study involving sixteen individuals from the same organization who tell their personal views about a business process, thus gathering a total of twenty process stories. The obtained results suggest that process stories may increase the meaningfulness, contextualization and overall richness of process models.
    Electronic ISSN: 1867-0202
    Topics: Computer Science , Economics
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  • 5
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    The benefits of incorporating utility dependencies in finite mixture probit models (2017)
    Springer
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    Publication Date: 2017-05-08
    Description: We propose an application of a new finite mixture multinomial conditional probit (FM-MNCP) model that accommodates preference heterogeneity and explicitly accounts for utility dependencies between choice alternatives considering both local and background contrast effects. The latter is accomplished by using a one-factor structure for segment-specific covariance matrices allowing for nonzero off-diagonal covariance elements. We compare the model to a finite mixture multinomial independent probit (FM-MNIP) model that as well accommodates heterogeneity but assumes independence. That way, we address the potential benefits of a model that additionally accounts for dependencies over a model that accommodates heterogeneity only. Our model comparison is based on empirical data for smoothies and is assessed in terms of fit, holdout validation, and market share predictions. One of the main findings of our empirical study is that allowing for utility dependencies may counterbalance the effects of considering heterogeneity, and vice versa. Additional findings from a simulation study indicate that the FM-MNCP model outperforms the FM-MNIP model with respect to parameter recovery.
    Print ISSN: 0171-6468
    Electronic ISSN: 1436-6304
    Topics: Mathematics , Economics
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  • 6
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    Trans-National Joint Research Projects (2017)
    Springer
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    Publication Date: 2017-05-18
    Electronic ISSN: 1867-0202
    Topics: Computer Science , Economics
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  • 7
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    Interview with Prof. Jeroen van den Hoven on “Why do Ethics and Values Matter in Business and Information Systems Engineering?” (2017)
    Springer
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    Publication Date: 2017-05-24
    Electronic ISSN: 1867-0202
    Topics: Computer Science , Economics
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  • 8
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    Meta Modeling for Business Process Improvement (2017)
    Springer
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    Publication Date: 2017-05-24
    Description: Conducting business process improvement (BPI) initiatives is a topic of high priority for today’s companies. However, performing BPI projects has become challenging. This is due to rapidly changing customer requirements and an increase of inter-organizational business processes, which need to be considered from an end-to-end perspective. In addition, traditional BPI approaches are more and more perceived as overly complex and too resource-consuming in practice. Against this background, the paper proposes a BPI roadmap, which is an approach for systematically performing BPI projects and serves practitioners’ needs for manageable BPI methods. Based on this BPI roadmap, a domain-specific conceptual modeling method (DSMM) has been developed. The DSMM supports the efficient documentation and communication of the results that emerge during the application of the roadmap. Thus, conceptual modeling acts as a means for purposefully codifying the outcomes of a BPI project. Furthermore, a corresponding software prototype has been implemented using a meta modeling platform to assess the technical feasibility of the approach. Finally, the usability of the prototype has been empirically evaluated.
    Electronic ISSN: 1867-0202
    Topics: Computer Science , Economics
    Published by Springer
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  • 9
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    Embedded Subscriber Identity Module eSIM (2017)
    Springer
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    Publication Date: 2017-04-25
    Electronic ISSN: 1867-0202
    Topics: Computer Science , Economics
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  • 10
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    Ergonomic workplace design in the fast pick area (2017)
    Springer
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    Publication Date: 2017-05-05
    Description: The aging society in many developed countries has made an ergonomic workplace design to an important topic among researchers and practitioners alike. We investigate the workplace design for order pickers that manually collect items from the shelves of a warehouse. Specifically, we treat the storage assignment, i.e., the placement of products in shelves of different height, and zoning, i.e., the partitioning of the storage space into areas assigned to separate pickers, in the fast pick area of a warehouse. A fast pick area unifies the most fast-moving items in a compact area, so that workers are relieved from unproductive travel, but face extraordinary ergonomic risks due to the frequent repetition of picking operations. Concerning the health of (aged) workers, it is crucial to reduce such risks. Thus, we define a combined ergonomic storage assignment and zoning problem with the objective of minimizing the maximum ergonomic burden among all workers. This problem is formalized, and two construction heuristics and a tabu search procedure are proposed. Our results show that neglecting ergonomic aspects and only focusing on picking performance leads to much higher ergonomic risks of the workforce.
    Print ISSN: 0171-6468
    Electronic ISSN: 1436-6304
    Topics: Mathematics , Economics
    Published by Springer
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