DE / EN
Dr. Justus Arne Schwarz

Dr. Justus Arne Schwarz

Universität Mannheim
Schloss Schneckenhof Ost, SO 229
68161 Mannheim
Tel.: +49 621 181-1371
Fax: +49 621 181-1579
E-Mail: schwarz(at)bwl.uni-mannheim.de

My research interests fall in the area of Operations Management. I develop predictive and prescriptive Business Analytics approaches for the quantitative analyses of dynamic and stochastic systems. The research can be clustered in the following three areas: 

  • Presentations at conferences, workshops, and research seminars

    • Schwarz, J. A. (2019): Rollover strategies under stochastic demand and production, 8th Workshop on Queueing Theory, Obergurgl, Austria, December 2019.
    • Schwarz, J. A. (2019): Optimal Rollover Strategies For Stochastic Demand and Production, INFORMS Annual Meeting, Seattle, USA, October 2019  (supported by DAAD).
    • Schwarz, J. A., G. P Kiesmüller, and R. Stolletz (2019): Optimal repair decisions in capacitated repair shops for flow lines, SMMSO 2019, Goslar, Germany, June 2019. 
    • Schwarz, J. A. (2019): Optimizing Sales and Production Rollover Strategies Under Stochastic Demand and Random Yield. POMS 2019 28th Annual Conference, Washington D.C., USA, May 2019 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).
    • Schwarz, J. A. and O. Karabag  (2019): Optimal rollover strategies under consideration of capacity constraints, Research seminar – TU Eindhoven, TU Eindhoven, Eindhoven, The Netherlands, April 2019.
    • Schwarz J. A. and R. Stolletz (2019): Impact of stochastic yield with learning on start of production.  11th Workshop for Supply Chain Management and Production, Obergurgl, Austria, March 2019.
    • Schnitzler, J. M., Schwarz, J. A., and R. Stolletz (2019): Impact of stochastic yield with learning on start of production. Productive4.0 Research Workshop, Istanbul, Turkey, January 2019.
    • Schwarz, J. A.  and R. Stolletz (2018):  Optimal repair decisions in capacitated repair shops for flow lines: First results. 7th Workshop on Queueing Theory, Obergurgl, Austria, December 2018.
    • Schwarz, J. A. and B. Tan (2018): Sales and Operations Planning for Product Rollovers under Limited Capacity, INFORMS Annual Meeting, Phoenix, USA, November 2018 (supported by DAAD).
    • Schwarz, J. A. (2018): Analyzing the impact of finite capacity on sales and operations planning for product rollovers. EURO 2018, Valencia, Spain, July 2018.
    • Schwarz, J. A. (2018): Sales and operations planning for product rollovers with finite production capacities. Manufacturing and Service Operations Management 2018 Conference, Dallas, USA, July 2018 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).
    • Schwarz, J. A. and R. Stolletz (2018): Structural properties of time-dependent flow production systems. StochMod18, Lancaster, UK, June 2018.
    • Schwarz, J. A. (2018): Sales and operations planning for product rollovers: Structural insights. 28. Workshop der Quantitativen Betriebs­wirtschafts­lehre, Hoechst, Germany, March 2018.
    • Schwarz, J. A. (2018): Sales and operations planning for product rollovers, Research seminar - Mercator School of Management, University of Duisburg-Essen, Duisburg, Germany, January 2018.
    • Schwarz, J. A. and R. Stolletz (2017): Minimizing work-in-process inventory in time-dependent flow lines by proactive Kanban control, Automotive Workshop, Brunswick, September 2017.
    • Schwarz, J. A. and R. Stolletz (2017): Minimizing work-in-process inventory in dynamic Kanban systems. OR2017, Berlin, September 2017.
    • Schwarz, J. A. and R. Stolletz (2017): Structural properties of flow production with time-dependent processing rates. INFORMS Applied Probability Society Conference 2017, Evanston, Illinois, USA, July 2017.
    • Schwarz, J. A. and Stolletz, R. (2017): Numerical comparison of Kanban mechanisms for production systems with time-dependent processing times. SMMSO 2017, Acaya (Lecce), Italy, June 2017 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).
    • Schwarz, J. A. (2017): Product rollovers with finite production capacities: first results. 9. Workshop für Supply Chain Management und Produktion, Obergurgl, Austria, March 2017.
    • Schwarz, J. A. and R. Stolletz (2016): Structural properties of flow production lines for stationary, transient and time-dependent settings. 5th Workshop on Queueing Theory, Obergurgl, Austria, December 2016.
    • Schwarz, J. A. and R. Stolletz (2016): Minimizing work-in-process inventory in stochastic and time-dependent flow lines. OR 2016, Hamburg, Germany, September 2016.
    • Schwarz, J. A. and R. Stolletz (2016): A proactive approach to Kanban allocation in stochastic and time-dependent flow lines. POMS 2016 27th Annual Conference, Orlando, USA, May 2016 (supported by DAAD).
    • Schwarz, J. A. and R. Stolletz (2016): BAPLib - A library and classification of Buffer Allocation Problem instances in serial flow lines. 8. Forschungs­seminar für Supply Chain Management und Produktion, Obergurgl, Austria, March 2016.
    • J. A. Schwarz and R. Stolletz (2015): Structural properties in stochastic and time-dependent flow lines. 4th Workshop on Queueing Theory, Obergurgl, Austria, December 2015.
    • Schwarz, J. A. and R. Stolletz (2015): The allocation of Kanban cards in stochastic and time-dependent production systems. OR 2015, Vienna, Austria, September 2015 (supported by IPID4all funds of the DAAD).
    • Schwarz, J. A. and R. Stolletz (2015): Performance analysis of time-dependent queueing systems: Survey and classification. 18th INFORMS Applied Probability Society Conference, Istanbul, Turkey, July 2015 (supported by IPID4all funds of the DAAD).
    • Weiss, S., J. A. Schwarz, and R. Stolletz (2015): Buffer Allocation Problems for stochastic flow lines with unreliable machines. SMMSO 2015, Volos, Greece, June 2015 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).
    • Schwarz, J. A. and R. Stolletz (2014): Performance analysis of time-dependent queueing systems: A survey and classification. 3rd Workshop on Queueing Theory, Obergurgl, Austria, December 2014.
    • Schwarz, J. A. (2014): A classification of approaches to the performance evaluation of time-dependent queues. 8th Young European Queueing Theorists Workshop, Eindhoven, Netherlands, November 2014 (invited talk).
    • Schwarz, J. A. and R. Stolletz (2014): Setting Kanban cards for non-stationary and stochastic flow lines via sampling. OR 56 - 56th Conference of the UK Operational Research Society, London, UK, September 2014 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).
    • Schwarz, J. A. and R. Stolletz (2014): Setting Kanban cards for production systems under non-stationary and stochastic operating environments. OR 2014, Aachen, September 2014.
    • Schwarz, J. A., G. Selinka, and R. Stolletz (2014): Analytical performance evaluation of time-dependent queues: A classification.  StochMod14, Mannheim, July 2014.
    • Schwarz, J. A. and R. Stolletz (2013): Setting Kanban cards for production systems under non-stationary and stochastic operating environments. 2nd Workshop on Queueing Theory, Obergurgl, Austria, December 2013.
    • Schwarz, J. A. and R. Stolletz (2013): A sampling approach for the analysis of time-dependent stochastic flow lines. SMMSO 2013, Kloster Seeon, May 2013.
    • Schwarz, J. A. and R. Stolletz (2013): Evaluation and optimization of buffer allocations in time-dependent stochastic flow lines. 23. Workshop für Quantitative Betriebs­wirtschafts­lehre, Altleiningen, February 2013.
    • Schwarz, J. A. and R. Stolletz (2012): Time-dependent stochastic flow lines. Workshop on Queueing Theory, Obergurgl, Austria, December 2012.
    • Schwarz, J. A., R. Stolletz, and S. Göttlich (2012): Time-dependent stochastic tandem queues. Brownbag Seminar Operations Management & Operations Research, Mannheim, November 2012.
    • Schwarz, J. A. (2012): A discrete time approach to analyze the behavior of Milkrun supplied inventories. OR 2012, Hanover, September 2012.
  • Education

    03/2012-04/2016    
    Doctoral Studies in Business Administration, Chair of Production Management (Prof. Stolletz), University of Mannheim

    10/2006-12/2011 
    Studies in Business Engineering (Diploma), Karlsruhe Institute of Technology (KIT)

    09/2009-06/2010 
    Studies in Engineering and Technology Management (M.S.), Portland State University

    07/2006 
    Abitur, Gymnasium Oberalster, Hamburg

  • Awards and grants

    • Südwestmetall Förderpreis 2016, awarded by the Baden-Wuerttemberg Employers’ Association of the Metal and Electrical Industry,  for the Ph.d. thesis „Analysis of buffer allocations in time-dependent and stochastic flow lines“
    • Dieter Arnold Preis 2012, awarded by the „Wissenschaft­liche Studien­gesellschaft für Fördertechnik Karlsruhe e.V.“,  for the diploma thesis „Modellierung einer Serienfertigung mit Kanban-Heijunka-Steuerung und Materialbereitstellung über Milkrun-Zyklen“ (Modeling of a Heijunka leveled Kanban controlled production system, with auxiliary materials distributed by Milkrun cycles)
    • Camelot Innovative Value Chain Thesis Award for the diploma thesis „Modellierung einer Serienfertigung mit Kanban-Heijunka-Steuerung und Materialbereitstellung über Milkrun-Zyklen“ (Modeling of a Heijunka leveled Kanban controlled production system, with auxiliary materials distributed by Milkrun cycles)
    • GfPM Thesis Award 2012 for the diploma thesis „Modellierung einer Serienfertigung mit Kanban-Heijunka-Steuerung und Materialbereitstellung über Milkrun-Zyklen“ (Modeling of a Heijunka leveled Kanban controlled production system, with auxiliary materials distributed by Milkrun cycles)
    • BVL Thesis Award 2012 for the diploma thesis „Modellierung einer Serienfertigung mit Kanban-Heijunka-Steuerung und Materialbereitstellung über Milkrun-Zyklen“ (Modeling of a Heijunka leveled Kanban controlled production system, with auxiliary materials distributed by Milkrun cycles)
    • Fulbright Scholarship, 2009-2010
    • Scholarship of the Konrad Adenauer Stiftung, 2006-2011
  • Professional experience

    09/2016-present
    Assistant Professor (Akademischer Rat auf Zeit), Chair of Production Management (Prof. Stolletz), University of Mannheim

    06/2016–08/2016         
    Visiting Scholar, Koc University, College of Administrative Sciences and Economics, Turkey

    05/2016–06/2016        
    Visiting Scholar, Massachusetts Institute of Technology, Laboratory for Manufacturing and Productivity, USA

    03/2012-04/2016          
    Research Assistant, Chair of Production Management (Prof. Stolletz), University of Mannheim

    04/2011-06/2011
    Internship, The Boston Consulting Group GmbH, Johannesburg South Africa

    11/2010-02/2011 
    Internship, Robert Bosch GmbH, Karlsruhe

    09/2008-10/2008 
    Internship, Preh GmbH, Bad Neustadt a. d. Saale