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Publications

The research results of the group are published in peer-reviewed journals and presented at international conferences and workshops.


Refereed publications

  • Çelik, B.,  J. A. Schwarz und B.Tan (2023) "New product introductions with selection of unique and common features in monopoly markets”, Omega - The international Journal of Management Science, in press
  • Schwarz, J. A. and B. Tan. (2021). "Optimal sales and production rollover strategies under capacity constraint". European Journal of Operational Research, 294 (2), 507-524.                                                 
  • Weiss, S., J. A. Schwarz and R. Stolletz (2019).  „The Buffer Allocation Problem in production lines: Formulations, solution methods, and instances”, IISE Transactions, former IIE Transactions, 51 (5), 456-485.
  • Schwarz, J. A., G. Selinka and R. Stolletz (2016).  "Performance analysis of time-dependent queueing systems: Survey and classification”, Omega - The international Journal of Management Science, 63, 170-189.

  • Schwarz, J. A. and M. Epp (2016).  "Performance evaluation of a transportation type bulk queue with generally distributed inter-arrival times”, International  Journal of Production Research, 54 (20), 6251-6264.

  • Göttlich, S., S. Kühn,  J. A. Schwarz and R. Stolletz (2016). "Approximations of time-dependent  unreliable flow lines with finite buffers”, Mathematical Methods of Operations Research, 83 (3), 295-323.

  • Schwarz, J. A., J. Stoll and E. Özden (2015). "A general model for batch building processes under timeout and capacity rule”, Annals of Operations Research, 231 (1), 5-31.

  • Daim, T. U., D. Lim, F. A. Gomez, J. Schwarz and S. Jovanovic (2014). "Storage technologies for wind power in the Columbia River Gorge”, International Journal of Sustainable Energy, 33 (1), 1-15.




Other publications


Presentations

2024

  • Kunz, M. and Schwarz, J. A.: A new approach of staffing for queueing systems with a finite customer population and deadlines, Graduate Program in Operations Management Workshop, Ingolstadt, Germany, January 2024.

2023

  • Kunz, M. and Schwarz, J. A.: Combining time-dependent and state-dependent staffing policies for queueing systems with a finite customer population, 10th Workshop on Queueing Theory, Obergurgl, Austria, December 2023.

  • Schwarz, J. A.: A production planning model for non-stationary and stochastic yield in the semiconductor industry, Informs Applied Probability Society Conference 2023, Nancy, France, June2023.
  • Owens, N. and Schwarz, J. A.: A model and initial results for optimal product rollover strategies under uncertain supply, 32nd Workshop der Quantitativen Betriebswirtschaftslehre, Bad Windsheim, Germany, March 2023.

2022

  • Kunz, M. and Schwarz, J. A.: Non-stationary queuing systems with a finite customer population, 9th Workshop on Queueing Theory, Obergurgl, Austria, December 2022.
  • Schwarz, J. A.: Ramp-up with stochastic and non-stationary yield: Insights from a Newsvendor approach, OR 2022, Karlsruhe, Germany, September 2022.

  • Owens, N. and Schwarz, J. A.: Modeling of product rollovers with stochastic production processes, Graduate Program in Operations Management Workshop, Ingolstadt, Germany, July 2022.
  • Schwarz, J. A.,  F. Karaesmen und R. Stolletz: A newsvendor approach to production planning with stochastic and non-stationary yield, Conferences on Stochastic Models of Manufacturing and Service Operations 2022, Escandille, Autrans (Grenoble), France, June 2022.
  • Schwarz, J. A.: Production planning with stochastic and non-stationary yield in the semiconductor industry, Brown Bag Seminar University of Passau - Recent developments in data science, Passau, Germany, June 2022.
  • Schwarz, J. A.: „AI Enhanced Digital Twins for Production Management: Requirements, Approaches, and Future Challenges, GFFT Insight: Wie werden Analytics und KI die Produktion verändern, online,  April 2022.
  • Schwarz, J. A. und N. Owens: Product Rollover strategies under stochastic production processes, 12th Workshop for Supply Chain Management and Production, Obergurgl, Austria, March 2022.

2019

  • Schwarz, J. A.: Rollover strategies under stochastic demand and production, 8th Workshop on Queueing Theory, Obergurgl, Austria, December 2019.
  • Diefenbach, J. M., Schwarz, J. A., and R. Stolletz: Second thoughts on not so random sampling, 8th Workshop on Queueing Theory, Obergurgl, Austria, December 2019.
  • Schwarz, J. A.: 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: Optimal repair decisions in capacitated repair shops for flow lines, SMMSO 2019, Goslar, Germany, June 2019.
  • Schnitzler, J. M., Schwarz, J. A. und R. Stolletz: Impact of stochastic yield with learning on start of production', Conferences on Stochastic Models of Manufacturing and Service Operations 2019, Goslar, Germany, June 2019.
  • Schwarz, J. A.: 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-Stegler-Gedächtnis-Stiftung).
  • Schwarz, J. A. and O. Karabag: 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: 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: Impact of stochastic yield with learning on start of production. Productive4.0 Research Workshop, Istanbul, Turkey, January 2019.

2018

  • Schwarz, J. A.  and R. Stolletz:  Optimal repair decisions in capacitated repair shops for flow lines: First results. 7th Workshop on Queueing Theory, Obergurgl, Austria, December 2018.
  • Schnitzler, J. M., Schwarz, J. A., and R. Stolletz: First “random thoughts” on not so random sampling. 7th Workshop on Queueing Theory, Obergurgl, Austria, December 2018.
  • Schwarz, J. A. and B. Tan: Sales and Operations Planning for Product Rollovers under Limited Capacity, INFORMS Annual Meeting, Phoenix, USA, November 2018 (supported by DAAD).
  • Schwarz, J. A.: Analyzing the impact of finite capacity on sales and operations planning for product rollovers. EURO 2018, Valencia, Spain, July 2018.
  • Schwarz, J. A.: 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: Structural properties of time-dependent flow production systems. StochMod18, Lancaster, UK, June 2018.
  • Schwarz, J. A.: Optimal sales and production rollover strategies under limited capacity, Research Seminar Koc University, Istanbul, Turkey,  June 2018.

  • Schwarz, J. A.: Sales and operations planning for product rollovers: Structural insights. 28. Workshop der Quantitativen Betriebswirtschaftslehre, Hoechst, Germany, March 2018.
  • Schwarz, J. A.: Sales and operations planning for product rollovers, Research seminar – Mercator School of Management, University of Duisburg-Essen, Duisburg, Germany, January 2018.

2017

  • Schwarz, J. A. and R. Stolletz: 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: Minimizing work-in-process inventory in dynamic Kanban systems. OR2017, Berlin, September 2017.
  • Schwarz, J. A. and R. Stolletz: 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.: 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.: Product rollovers with finite production capacities: first results. 9. Workshop für Supply Chain Management und Produktion, Obergurgl, Austria, March 2017.

2016

  • Schwarz, J. A. and R. Stolletz: 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: Minimizing work-in-process inventory in stochastic and time-dependent flow lines. OR 2016, Hamburg, Germany, September 2016.
  • Schwarz, J. A. and R. Stolletz: 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: 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.

2015

  • Becker, A., J. A. Schwarz, and R. Stolletz: Stochastic influences on ramp-up planning. 4th Workshop on Queueing Theory, Obergurgl, Austria, December 2015.
  • Rakhee, J. A. Schwarz, and R. Stolletz: Time-dependent Channel Reservation Scheme for Handoff Calls in a Cellular Mobile Network. 4th Workshop on Queueing Theory, Obergurgl, Austria, December 2015. 
  • J. A. Schwarz and R. Stolletz: Structural properties in stochastic and time-dependent flow lines. 4th Workshop on Queueing Theory, Obergurgl, Austria, December 2015.
  • Schwarz, J. A. and R. Stolletz: 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: 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: Buffer Allocation Problems for stochastic flow lines with unreliable machines. SMMSO 2015, Volos, Greece, June 2015 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

2014

  • Schwarz, J. A. and R. Stolletz: Performance analysis of time-dependent queueing systems: A survey and classification. 3rd Workshop on Queueing Theory, Obergurgl, Austria, December 2014.
  • Schwarz, J. A.: 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: 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: 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: Analytical performance evaluation of time-dependent queues: A classification.  StochMod14, Mannheim, July 2014.

2013

  • Schwarz, J. A. and R. Stolletz: 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: A sampling approach for the analysis of time-dependent stochastic flow lines. SMMSO 2013, Kloster Seeon, May 2013.
  • Schwarz, J. A. and R. Stolletz: Evaluation and optimization of buffer allocations in time-dependent stochastic flow lines. 23. Workshop für Quantitative Betriebswirtschaftslehre, Altleiningen, February 2013.           

2012

  • Schwarz, J. A. and R. Stolletz: Time-dependent stochastic flow lines. Workshop on Queueing Theory, Obergurgl, Austria, December 2012.
  • Schwarz, J. A.: A discrete time approach to analyze the behavior of Milkrun supplied inventories. OR 2012, Hanover, September 2012.


Chair of Production Management

INSTITUTE OF BUSINESS ADMINISTRATION

Prof. Dr. Justus Arne Schwarz


Office                         

Stefanie Heitzer

Building: RW(S) Room:142
Tel.: +49 (0)941 943 - 2277
Fax: +49 (0)941 943 - 2828 ProductionManagement@ur.de