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Auflistung nach Autor:in "Tosun, Cafer"

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  • Konferenzbeitrag
    Available-to-promise on an in-memory column store
    (Datenbanksysteme für Business, Technologie und Web (BTW), 2011) Tinnefeld, Christian; Müller, Stephan; Kaltegärtner, Helen; Hillig, Sebastian; Butzmann, Lars; Eickhoff, David; Klauck, Stefan; Taschik, Daniel; Wagner, Björn; Xylander, Oliver; Tosun, Cafer; Zeier, Alexander; Plattner, Hasso
    Available-To-Promise (ATP) is an application in the context of Supply Chain Management (SCM) systems and provides a checking mechanism that calculates if the desired products of a customer order can be delivered on the requested date. Modern SCM systems store relevant data records as aggregated numbers which implies the disadvantages of maintaining redundant data as well as inflexibility in querying the data. Our approach omits aggregates by storing all individual data records in an in-memory, column-store and scans through all relevant records on-the-fly for each check. We contribute by describing the novel data organization and a lockingfree, highly-concurrent ATP checking algorithm. Additionally, we explain how new business functionality such as instant rescheduling of orders can be realized with our approach. All concepts are implemented within a prototype and benchmarked by using an anonymized SCM dataset of a Fortune 500 consumer products company. The paper closes with a discussion of the results and gives an outlook how this approach can help companies to find the right balance between low inventory costs and high order fulfillment rates.
  • Konferenzbeitrag
    xSellerate: supporting sales representatives with real-time information in customer dialogs
    (IMDM 2011 – Proceedings zur Tagung Innovative Unternehmensanwendungen mit In-Memory Data Management, 2011) Wust, Johannes; Krueger, Jens; Blessing, Sebastian; Tosun, Cafer; Zeier, Alexander; Plattner, Hasso
    The introduction of 64 bit address spaces in commodity operating systems and the constant drop in hardware prices make large capacities of main memory in the order of terabytes possible. Storing the entire ERP data of large companies in main memory becomes technically feasible and economically viable. Especially columnoriented in-memory databases are a promising platform for enterprise applications to run even complex reports in merely seconds. Response-times in the order of seconds mean that we can use enterprise applications in completely new ways, for example, on mobile devices. In this paper, we demonstrate how mobile applications backed by in-memory data management can support mobile workers. We illustrate this with xSellerate, a running prototype of an application that supports sales representatives with real-time product recommendations and availability checks during customer dialogs. This way, organizations can leverage their operational data to support their sales force in the field and thus, achieve a competitive advantage over rival companies.