DE / EN

Presentations at conferences, workshops, and research seminars

2019

Vogel, J. and R. Stolletz (2019): Medium-term capacity planning in stochastic MTO production systems with time-dependent demand. EURO conference 2019, Dublin, Ireland, June 2019.

Vogel, J. and R. Stolletz (2019): Medium-term capacity planning in stochastic MTO production systems with time-dependent demand. SMMSO 2019, Goslar, June 2019.

Schnitzler, J. M., Schwarz, J. A., and R. Stolletz (2019): Impact of stochastic yield with learning on start of production. SMMSO 2019, Goslar, Germany, June 2019.

Schwarz, J. A., G. P Kiesmüller, and R. Stolletz (2018): Optimal repair decisions in capacitated repair shops for flow lines, SMMSO 2019, Goslar, Germany, June 2019.

Stolletz, R. (2019): Dynamic Decisions on Processing Rates in Make-to-Order Production Systems. POMS 2019 28th Annual Conference, Washington D.C., USA, May 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.

Biondi, M. and R. Stolletz (2019): Maintenance and production scheduling for a single machine with maintenance mode selection. 29. Workshop der Quantitativen Betriebswirtschaftslehre, Schloss Hirschberg, Germany, March 2019.

Foroughi, A. and R. Stolletz (2019): Performance evaluation of time-dependent bulk queues. 29. Workshop der Quantitativen Betriebswirtschaftslehre, Schloss Hirschberg, Germany, March 2019.

Zenouzzadeh, S. M. and R. Stolletz (2019): Shift Scheduling in Multi-stage Systems. 29. Workshop der Quantitativen Betriebswirtschaftslehre, Schloss Hirschberg, Germany, March 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.

Vogel, J. and R. Stolletz (2019): Capacity decisions in MTO production systems with time-dependent demand. 11th Workshop for Supply Chain Management and Production, Obergurgl, Austria, March 2019.

Zenouzzadeh, S. M. and R. Stolletz (2019): Shift Scheduling in Multi-stage Systems. 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.

2018

Foroughi. A.  and R. Stolletz (2018): Performance evaluation of time-dependent bulk queues. 7th Workshop on Queueing Theory, Obergurgl, Austria, December 2018.

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.

Vogel, J. and R. Stolletz (2018): Stationary results for the optimization of service rates. 7th Workshop on Queueing Theory, Obergurgl, Austria, December 2018.

Schnitzler, J. M., Schwarz, J. A., and R. Stolletz (2018): First “random thoughts” on not so random sampling. 7th Workshop on Queueing Theory, Obergurgl, Austria, December 2018.

Schnitzler, J. M. and R. Stolletz (2018): A branch and bound procedure for the chance-constrained stochastic assembly line balancing problem. Automotive Workshop, Frankfurt (Oder), November 2018.

Stolletz, R. (2018): A Branch and Bound Procedure for Chance Constrained Stochastic Assembly Line Balancing, INFORMS Annual Meeting, Phoenix, USA, November 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.

Schnitzler, J. M. and R. Stolletz (2018): A branch and bound procedure for the stochastic assembly line balancing problem. EURO 2018, Valencia, Spain, July 2018 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

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).

Vogel, J. and R. Stolletz (2018). Does the future matter? Optimization of time-dependent service systems. Manufacturing and Service Operations Management 2018 Conference, Dallas, USA, July 2018 (supported by IPID4all funds of the DAAD).

Schwarz, J. A. and R. Stolletz (2018): Structural properties of time-dependent flow production systems. StochMod18, Lancaster, UK, June 2018.

Vogel, J. and R. Stolletz (2018). Does the future matter? Optimization of time-dependent service systems. StochMod18, Lancaster, UK, June 2018 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Schwarz, J. A. (2018): Sales and operations planning for product rollovers: Structural insights. 28. Workshop der Quantitativen Betriebswirtschaftslehre, Hoechst, Germany, March 2018.

Schnitzler, J. M. and R. Stolletz (2018): A branch and bound procedure for the stochastic assembly line balancing problem. 28. Workshop der Quantitativen Betriebswirtschaftslehre, Hoechst, Germany, March 2018.

Foroughi, A. and R. Stolletz (2018): Appointment scheduling with queueing systems. 10th Workshop for Supply Chain Management and Production, Obergurgl, Austria, 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.

2017

Schnitzler, J. M. and R. Stolletz (2017): A branch and bound procedure for the stochastic assembly line balancing problem. 6th Workshop on Queueing Theory, Obergurgl, Austria, December 2017.

Vogel, J. and R. Stolletz (2017). Does the future matter? Optimization of time-dependent service systems. 6th Workshop on Queueing Theory, Obergurgl, Austria, December 2017.

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

Vogel, J. and R. Stolletz (2017): Optimization of time-dependent service systems with discretionary task completion. Politecnico di Milano, Italy, July 2017.

R. Stolletz (2017): Demand management for distribution centers: Does stochastic variability matter? IFORS Conference, Québec, Canada, July 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

Vogel, J. and R. Stolletz (2017): Optimization of time-dependent processing rates in stochastic systems. INFORMS Applied Probability Society Conference 2017, Evanston, Illinois, USA, July 2017

Schwarz, J. A. and R. Stolletz (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).

Vogel, J. and R. Stolletz (2017): When to react to increasing demand? Optimization of service systems with discretionary task completion. SMMSO 2017, Acaya (Lecce), Italy, June 2017 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Biondi, M and R. Stolletz (2017): Flexible maintenance and production scheduling. 27. Workshop der Quantitativen Betriebswirtschaftslehre, Klappholttal (Sylt), March 2017.

Schnitzler, J. M. and R. Stolletz (2017): A sampling approach for line balancing with stochastic task completion times. 27. Workshop der Quantitativen Betriebswirtschaftslehre, Klappholttal (Sylt), March 2017.

Schulze, E. and  R. Stolletz (2017): A simulation-optimization approach for shift scheduling in call centers with base load- and peak staffing. 27. Workshop der Quantitativen Betriebswirtschaftslehre, Klappholttal (Sylt), March 2017.

Schwarz, J. A. (2017): Product rollovers with finite production capacities: first results. 9. Workshop für Supply Chain Management und Produktion, Obergurgl, Austria, March 2017.

Vogel, J. and R. Stolletz (2017): Does the future matter? Forecast-based optimization of time-dependent processing rates. 9th Workshop for Supply Chain Management and Production, Obergurgl, Austria, March 2017.

2016

Franz, A. and R. Stolletz (2016): Demand management for truck handling operations: Does stochastic variability matter? 5th Workshop on Queueing Theory, Obergurgl, Austria, December 2016 (supported by Erich-Becker-Stiftung).

Schnitzler, J. M. and R. Stolletz (2016): A sampling approach for line balancing with stochastic task completion times. 5th Workshop on Queueing Theory, Obergurgl, Austria, December 2016.

Schulze E. and R. Stolletz (2016): A simulation-optimization approach for shift scheduling in call centers with abandonments and retrials. 5th Workshop on Queueing Theory, Obergurgl, Austria, December 2016.

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.

Stolletz, R. (2016): Requirement planning and scheduling: Decision problem and approaches. 5th Workshop on Queueing Theory, Obergurgl, Austria, December 2016.

Vogel, J. and R. Stolletz (2016): Does the future matter? Forecast-based optimization of time-dependent processing rates. 5th Workshop on Queueing Theory, Obergurgl, Austria, December 2016.

Schnitzler, J. M. and R. Stolletz (2016): Line balancing with stochastic task completion times - numerical investigation of a sampling approach. Automotive Workshop, Hagen, September 2016.

Stolletz, R. (2016): Demand management for distribution centers: Does stochastic variability matter? Research Seminar, P&OM Havanna 2016, Cuba, September 2016.

Stolletz, R. (2016): Demand management for distribution centers: Does stochastic variability matter? Research Seminar, Politecnico di Milano, Italy, July 2016.

Franz, A. und R. Stolletz (2016): Optimizing time-dependent arrival rates for general truck handling operations. StochMod16, Louvain-la-Neuve, Belgium, July 2016 (supported by Erich-Becker-Stiftung).

Vogel, J. und R. Stolletz (2016): Optimizing time-dependent processing rates in stochastic environments. StochMod16, Louvain-la-Neuve, Belgium, July 2016.

Stolletz, R. (2016): Integrated staffing and scheduling in call centers. StochMod16, Louvain-la-Neuve, Belgium, July 2016.

Stolletz, R. (2016): Managing Variability in Workforce Planning. Research Seminar, Vrije Universiteit Amsterdam, Netherlands, June 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).

Franz, A. and R. Stolletz (2016): Optimizing arrival patterns for truck handling operations. 26. Workshop für Quantitative Betriebswirtschaftslehre, Meinerzhagen-Valbert, March 2016 (supported by Erich-Becker-Stiftung).

Vogel, J. and R. Stolletz (2016): Optimizing time-dependent processing rates in stochastic environments. 26. Workshop für Quantitative Betriebswirtschaftslehre, Meinerzhagen-Valbert, March 2016.

Biondi, M. and R. Stolletz (2016): Integrated maintenance and production: A survey and classification of shop scheduling problems. 8. Forschungsseminar für Supply Chain Management und Produktion, Obergurgl, Austria, March 2016.

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.

2015

Becker, A., J. A. Schwarz, and R. Stolletz (2015): Stochastic influences on ramp-up planning. 4th Workshop on Queueing Theory, Obergurgl, Austria, December 2015.

Franz, A. and R. Stolletz (2015): Impact of stochastic variability on the optimization of arrival patterns. 4th Workshop on Queueing Theory, Obergurgl, Austria, December 2015 (supported by Erich-Becker-Stiftung).

Rakhee, J. A. Schwarz, and R. Stolletz (2015): Time-dependent Channel Reservation Scheme for Handoff Calls in a Cellular Mobile Network. 4th Workshop on Queueing Theory, Obergurgl, Austria, December 2015.

Saweljew, A., R. Stolletz, and G. Koole (2015): Integrated requirement planning and shift scheduling for call centers with uncertain arrival rates. 4th Workshop on Queueing Theory, Obergurgl, Austria, December 2015.

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.

Vogel, J. and R. Stolletz (2015): Decision models for queueing systems with adaptive service rates. 4th Workshop on Queueing Theory, Obergurgl, Austria, December 2015.

Franz, A. (2015): Analyse und Optimierung der LKW-Abfertigung an Luftfrachtterminals. Stipendiaten-Symposium der Erich-Becker-Stiftung, Frankfurt, November 2015 (supported by Erich-Becker-Stiftung).

Saweljew, A. and G. Koole (2015): Integrated requirement planning and shift scheduling for call centers with uncertain arrival rates. 2015 INFORMS Annual Meeting, Philadelphia, USA, November 2015 (supported by Karin-Islinger-Stiftung and by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Becker, A. and R. Stolletz (2015): Strategic ramp-up planning in automotive production networks. Automotive Workshop, Munich, September 2015.

Becker, A. and R. Stolletz (2015): Strategic ramp-up planning in automotive production networks. OR 2015, Vienna, Austria, September 2015.

Lieder, A. and R. Stolletz (2015): A dynamic programming approach for the aircraft scheduling problem with general airport runway configurations. OR 2015, Vienna, Austria, September 2015 (supported by Erich-Becker-Stiftung).

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).

Vogel, J. and R. Stolletz (2015): Decision models for queueing systems with adaptive service rates. OR 2015, Vienna, Austria, September 2015 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Weiss, S. and R. Stolletz (2015): Optimization of buffer allocations in flow lines with limited supply.  OR 2015, Vienna, Austria, September 2015 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Franz, A. and R. Stolletz (2015): Performance approximation of drop & swap operations in on-site logistics. EURO 2015, Glasgow, UK, July 2015 (supported by Erich-Becker-Stiftung).

Lieder, A. and R. Stolletz (2015): Scheduling aircraft take-offs and landings on parallel runways. EURO 2015, Glasgow, UK, July 2015 (supported by Erich-Becker-Stiftung).

Selinka, G. and R. Stolletz (2015): Performance approximation of time-dependent queueing systems with abandonments. EURO 2015, Glasgow, UK, July 2015 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Stolletz, R. and A. Franz (2015): Optimizing arrival patterns in time-dependent queues. EURO 2015, Glasgow, UK, July 2015.

Franz, A. (2015): Optimizing time-dependent arrival rates for truck handling operations. 4th INFORMS Transportation Science and Logistics Society Workshop, Berlin, July 2015 (supported by Erich-Becker-Stiftung).

Saweljew, A. and R. Stolletz (2015): Integrated requirement planning and shift scheduling for call centers with uncertain arrival rates. 18th INFORMS Applied Probability Society Conference, Istanbul, Turkey, July 2015.

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).

Stolletz, R. (2015): Optimizing arrival patterns in time-dependent queues. 18th INFORMS Applied Probability Society Conference, Istanbul, Turkey, July 2015.

Weiss, S.,  A. Matta, and R. Stolletz (2015): Optimization of buffer allocations in flow lines with limited supply. 18th INFORMS Applied Probability Society Conference, Istanbul, Turkey, July 2015 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Becker, A., E. Zamorano, and R. Stolletz (2015): Task assignment for personnel in check-in counters. Workshop on Workforce Planning, Mannheim, July 2015.

Saweljew, A. and R. Stolletz (2015): Integrated staffing and scheduling under arrival rate uncertainty. Workshop on Workforce Planning, Mannheim, July 2015.

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 IPID4all funds of the DAAD and by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Stolletz, R. (2015): Sample-based optimization of buffer allocations in stochastic flow lines with limited supply. OPAC Research Seminar, Technische Universiteit Eindhoven, Netherlands, April 2015.

Lieder, A. and R. Stolletz (2015): Scheduling aircraft take-offs and landings on heterogeneous and interdependent runways. 7. Forschungsseminar für Supply Chain Management und Produktion, Obergurgl, Austria, March 2015 (supported by Erich-Becker-Stiftung).

Saweljew, A. and R. Stolletz (2015): Integrated requirement planning and shift scheduling with recourse. 7. Forschungsseminar für Supply Chain Management und Produktion, Obergurgl, Austria, March 2015.

Weiss, S. and R. Stolletz (2015): Modeling of limited supply in flow lines. 7. Forschungsseminar für Supply Chain Management und Produktion, Obergurgl, Austria, March 2015.

Guhlich, H., M. Fleischmann, and R. Stolletz (2015): Online order acceptance and scheduling in a multi-stage production system. 25. Workshop für Quantitative Betriebswirtschaftslehre, Schwerte, March 2015.

Selinka, G. and R. Stolletz (2015): Performance approximation of time-dependent queueing systems with abandonments. 25. Workshop für Quantitative Betriebswirtschaftslehre, Schwerte, March 2015.

Vogel, J. and R. Stolletz (2015): Adjustable service rates in queueing systems. 25. Workshop für Quantitative Betriebswirtschaftslehre, Schwerte, March 2015.

Weiss, S. and R. Stolletz (2015): A sample-based branch and bound algorithm for buffer optimization in stochastic flow lines. 25. Workshop für Quantitative Betriebswirtschaftslehre, Schwerte, March 2015.

Franz, A. (2015): Optimizing arrival patterns for truck handling operations. OPAC Research Seminar, Technische Universiteit Eindhoven, Netherlands, February 2015.

2014

Lieder, A. and R. Stolletz (2014): Optimal scheduling of Airport Runway Operations. 3rd Workshop on Queueing Theory, Obergurgl, Austria, December 2014 (supported by Erich-Becker-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.

Stolletz, R. and A. Franz (2014): Optimization of time-dependent arrival rates. 3rd Workshop on Queueing Theory, Obergurgl, Austria, December 2014.

Weiss, S. and R. Stolletz (2014): Sample-based optimization of buffer allocations in flow lines with limited supply. 3rd Workshop on Queueing Theory, Obergurgl, Austria, December 2014.

Stolletz, R. (2014): Optimization of Arrival Patterns for Time-dependent Queueing Models. INFORMS Annual Meeting 2014, San Francisco, USA, November 2014.

Saweljew, A. and G. Koole (2014): The impact of performance bounds on staffing and scheduling decisions in call centers. Research Seminar, Vrije Universiteit Amsterdam, Netherlands, November 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).

Stolletz, R. (2014): Decisions in time-dependent service queues. 8th Young European Queueing Theorists Workshop, Eindhoven, Netherlands, November 2014 (keynote talk).

Stolletz, R. (2014): Optimization of stochastic systems: Demand management for dynamic queues. Research Seminar, Vrije Universiteit Amsterdam, Netherlands, October 2014.

Zamorano, E. and R. Stolletz (2014): Multiperiod Technician Routing and Scheduling. 37. Südwest-Workshop Operations Research, Kaiserslautern, October 2014.

Becker, A., R. Stolletz, and T. Stäblein (2014): Strategic ramp-up planning in automotive production networks. Automotive Workshop, Mannheim, September 2014.

Nikolajewski, S. and R. Stolletz (2014): Timing and configuration of capacity investments under incomplete demand information. Automotive Workshop, Mannheim, September 2014

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).

Guhlich, H., M. Fleischmann, R. Stolletz, and L. Moench (2014): Revenue management in a multi-stage ATO production environment. OR 2014, Aachen, September 2014.

Lieder, A., D. Moeke, R. Stolletz, and G. Koole (2014): Operational scheduling of care workers in long-term care facilities. OR 2014, Aachen, September 2014 (supported by Erich-Becker-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.

Weiss, S. and R. Stolletz (2014): Accelerating sample-based optimization methods of buffer allocations in flow lines. OR 2014, Aachen, September 2014.

Zamorano, E. and R. Stolletz (2014): Multiperiod Technician Routing and Scheduling. OR 2014, Aachen, September 2014 (supported by Erich-Becker-Stiftung).

Selinka, G. and R. Stolletz (2014): Time-dependent performance analysis of heterogeneous queueing systems. European Conference on Queueing Theory (ECQT 2014), Ghent, Belgium, August 2014.

Franz, A. and R. Stolletz (2014): Optimizing time-dependent arrival rates for truck handling operations at an air cargo terminal. IFORS 2014, Barcelona, Spain, July 2014 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Lieder, A., D. Moeke, R. Stolletz, and G. Koole (2014): Efficient Task Scheduling in Long-term Care Facilities. IFORS 2014, Barcelona, Spain, July 2014 (supported by Erich-Becker-Stiftung).

Franz, A. (2014): Optimizing appointment systems for truck handling operations at air cargo terminals. 11th GARS Junior Researchers' Workshop 2014, Bremen, July 2014 (supported by Erich-Becker-Stiftung).

Franz, A. and R. Stolletz (2014): Queueing-based optimization of truck appointment systems. StochMod14, Mannheim, July 2014 (supported by Erich-Becker-Stiftung).

Saweljew, A., R. Stolletz, and G. Koole (2014): The impact of service level agreements on call center performance. StochMod14, Mannheim, July 2014.

Schwarz, J. A., G. Selinka, and R. Stolletz (2014): Analytical performance evaluation of time-dependent queues: A classification.  StochMod14, Mannheim, July 2014.

Selinka, G. and R. Stolletz (2014): Performance analysis of heterogeneous queueing systems under time-dependent conditions.  StochMod14, Mannheim, July 2014.

Weiss, S. and R. Stolletz (2014): Sample-based optimization of buffer allocations in flow lines with correlations.  StochMod14, Mannheim, June 2014.

Stolletz, R. (2014): Integrated optimization of arrival patterns in time-dependent queueing models. Research Seminar, University of Innsbruck, Austria, June 2014.

Becker, A. (2014): Product platform allocation and optimal ramp-up sequence of derivatives: An analysis from the automotive industry. 2nd International Conference on Ramp-Up Management, Aachen, June 2014.

Stolletz, R. (2014): Demand management for dynamic queues. Cluster-wide Research Seminar, University of Augsburg, May 2014.

Lieder, A. (2014): Scheduling Airport Runway Operations with Dynamic Programming. GOR-Workshop on Logistics, Braunschweig, April 2014 (supported by Erich-Becker-Stiftung).

Becker, A. and R. Stolletz (2014): Simultaneous optimization of the derivative-to-plant allocation and the sequence of ramp-ups in the automotive industry. 24. Workshop für Quantitative Betriebswirtschaftslehre, Meinerzhagen-Valbert, March 2014.

Saweljew, A. and R. Stolletz (2014): Simultaneous agent requirement planning and scheduling for queuing systems with time-dependent demand. 24. Workshop für Quantitative Betriebswirtschaftslehre, Meinerzhagen-Valbert, March 2014.

Franz, A. and R. Stolletz (2014): Optimizing time-dependent arrival rates for truck handling operations. 6. Forschungsseminar für Supply Chain Management und Produktion, Obergurgl, Austria, March 2014 (supported by Erich-Becker-Stiftung).

Stolletz, R. (2014): Impatient customers and retrials in dynamic service systems. 6. Forschungsseminar für Supply Chain Management und Produktion, Obergurgl, Austria, March 2014.

2013

Becker, A. and R. Stolletz (2013): Optimal ramp-up sequence of derivatives: An analysis from the automotive industry - First results. 2nd Workshop on Queueing Theory, Obergurgl, Austria, December 2013.

Franz, A. and R. Stolletz (2013): Optimizing time-dependent arrival rates for M(t)/M/c queueing systems. 2nd Workshop on Queueing Theory, Obergurgl, Austria, December 2013.

Lieder, A., D. Moeke, R. Stolletz, and G. Koole (2013): Task scheduling in long-term care facilities: Efficiently meeting the needs and preferences of the clients. 2nd Workshop on Queueing Theory, Obergurgl, Austria, December 2013 (supported by Erich-Becker-Stiftung).

Saweljew, A., R. Stolletz, and G. Koole (2013): Models for integrated requirement planning and scheduling in time-dependent stochastic systems. 2nd Workshop on Queueing Theory, Obergurgl, Austria, December 2013.

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.

Weiss, S. and R. Stolletz (2013): A branch and bound algorithm for the Buffer Allocation Problem. 2nd Workshop on Queueing Theory, Obergurgl, Austria, December 2013.

Lieder, A., D. Briskorn, and R. Stolletz (2013): An efficient algorithm for scheduling groups of jobs with individual release dates. OR 2013, Rotterdam, Netherlands, September 2013 (supported by Erich-Becker-Stiftung).

Selinka, G. and R. Stolletz (2013): Performance analysis of heterogeneous queueing systems under time-dependent conditions. OR 2013, Rotterdam, Netherlands, September 2013 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Stolletz, R. and S. Weiss (2013): A Benders Decomposition approach for the design of lean production lines. MSOM 2013, Fontainebleau, France, July 2013.

Guhlich, H., R. Stolletz, and M. Fleischmann (2013): Revenue management for assemble-to-order manufacturing. EURO 2013, Rome, Italy, July 2013.

Weiss, S. and R. Stolletz (2013): Solving the Buffer Allocation Problem by Benders Decomposition with initial bounds. EURO 2013, Rome, Italy, July 2013 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Stolletz, R. and S. Weiss (2013): Buffer Allocation Using Exact Linear Programming Formulations and Sampling Approaches. MIM 2013, Saint Petersburg, Russia, June 2013.

Guhlich, H. and R. Stolletz (2013): Revenue Management for assemble-to-order companies. Guest lecture at FernUniversität in Hagen, Hagen, June 2013.

Stolletz, R. (2013): Designing lean manufacturing systems: Stationary and dynamic buffer allocation in flow lines. OMOR Research Seminar, ESSEC Business School, Paris, France, June 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.

Weiss, S. and R. Stolletz (2013): A Benders Decomposition approach for the optimization of flow lines with stochastic processing times. SMMSO 2013, Kloster Seeon, May 2013.

Stolletz, R. (2013): Sampling approaches for stationary and dynamic buffer allocation in flow lines. ORIE Seminar, Department for Operations Research and Industrial Engineering, Cornell University, Ithaca, USA, May 2013.

Stolletz, R. (2013): Impatient customers: Blessing or curse? POMS 2013 24th Annual Conference, Denver, USA, May 2013 (supported by Prechel-Stiftung e.V.).

Franz, A. and R. Stolletz (2013): Performance Analysis and Demand Management Approaches for Time-dependent and Stochastic Truck Handling Systems. 5. Forschungsseminar für Supply Chain Management und Produktion, Obergurgl, Austria, March 2013.

Weiss, S. and R. Stolletz (2013): Efficient bounds for the Buffer Allocation Problem. 5. Forschungsseminar für Supply Chain Management und Produktion, Obergurgl, Austria, March 2013.

Guhlich, H., M. Fleischmann, and R. Stolletz (2013): Revenue management in production with material and production constraints. 23. Workshop für Quantitative Betriebswirtschaftslehre, Altleiningen, February 2013.

Lieder, A., R. Stolletz, and D. Briskorn (2013): An efficient optimization algorithm for the aircraft scheduling problem with aircraft classes. 23. Workshop für Quantitative Betriebswirtschaftslehre, Altleiningen, February 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.

2012

Franz, A. and R. Stolletz (2012): Demand Management for Stochastic and Time-dependent Truck Handling Systems. Workshop on Queueing Theory, Obergurgl, Austria, December 2012.

Lieder, A., D. Moeke, G. Koole, and R. Stolletz (2012): Efficient staffing and task assignment in long-term care facilities. Workshop on Queueing Theory, Obergurgl, Austria, December 2012.

Schwarz, J. A. and R. Stolletz (2012): Time-dependent stochastic flow lines. Workshop on Queueing Theory, Obergurgl, Austria, December 2012.

Weiss, S. and R. Stolletz (2012): Efficient algorithms for the optimization of flow lines with stochastic processing times via sampling. Workshop on Queueing Theory, Obergurgl, Austria, December 2012.

Lieder, A. and R. Stolletz (2012): Scheduling approaches for groups of identical jobs with sequence-dependent setup times and time windows. 35. Südwest-Workshop, Karlsruhe, November 2012.

Stolletz, R. (2012): Time-dependent Performance Analysis of Truck Handling Operations at an Air Cargo Terminal. Research Seminar, DTU Management Engineering, Lyngby, Denmark, September 2012.

Franz, A., G. Selinka, and R. Stolletz (2012): Time-dependent Performance Approximation of Truck Handling Operations at an Air Cargo Terminal. International Conference on Airport Operations Management, Munich, September 2012.

Schwarz, J. A. (2012): A discrete time approach to analyze the behavior of Milkrun supplied inventories. OR 2012, Hanover, September 2012.

Zamorano, E. and R. Stolletz (2012): Comparison of solution approaches for multiskilled workforce scheduling at airport check-in counters. OR 2012, Hanover, September 2012.

Lieder, A., R. Stolletz, and D. Briskorn (2012): Scheduling aircraft landings using dynamic programming. EURO 2012, Vilnius, Lithuania, July 2012 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Zamorano, E. and R. Stolletz (2012): Heuristic solution approaches for check-in counters' workforce scheduling with heterogeneous skills.  EURO 2012, Vilnius, Lithuania, July 2012 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Stolletz, R. (2012): Modeling of retrials in time-dependent queueing systems. 9th International Workshop on Retrial Queues, Seville, Spain, June 2012 (supported by Prechel-Stiftung e.V.).

Franz, A. and R. Stolletz (2012): Performance Analysis of Slot-based Appointment Scheduling for Truck Handling Operations at an Air Cargo Terminal. 9th GARS Junior Researchers' Workshop 2012, Bremen, June 2012.

Lieder, A. and R. Stolletz (2012): Increasing airport capacity through active scheduling of aircraft landings (Poster presentation). 9th GARS Junior Researchers' Workshop 2012, Bremen, June 2012.

Zamorano, E. and R. Stolletz (2012):  Optimal scheduling of agents with different qualifications at airport check-in counters. 9th GARS Junior Researchers' Workshop 2012, Bremen, June 2012.

Weiss, S. and R. Stolletz (2012): Buffer allocation in stochastic flow lines using sampling approaches. StochMod12, Paris, France, May 2012 (supported by Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Franz, A. and R. Stolletz (2012): Slot Scheduling of Truck Handling Operations at an Air Cargo Terminal. KARS Aviation Workshop 2012, Cologne, April 2012.

Zamorano, E. and R. Stolletz (2012):  A Rolling Planning Horizon procedure for check-in counters' workforce scheduling. 22. Workshop für Quantitative Betriebswirtschaftslehre, Emmelndorf, March 2012.

Lieder, A. and R. Stolletz (2012): A dynamic programming approach to the aircraft landing problem with aircraft classes. 4. Forschungsseminar für Supply Chain Management und Produktion, Obergurgl, Austria, March 2012.

Weiss, S. and R. Stolletz (2012): Optimization of flow lines with stochastic processing times using sampling approaches.  4. Forschungsseminar für Supply Chain Management und Produktion, Obergurgl, Austria, March 2012.

Guhlich, H. and R. Stolletz (2012): Revenue Management in production systems with capacity and raw material constraints. 4. Forschungsseminar für Supply Chain Management und Produktion, Obergurgl, Austria, March 2012.

Guhlich, H. and M. Fleischmann (2012): Revenue Management in ATO production environments. Demand Fulfillment Workshop, Mannheim, February 2012.

2011

Selinka, G. and R. Stolletz (2011): Analyzing the dynamic behavior of queueing systems. OR 2011, Zurich, Switzerland, September 2011.

Lieder, A., R. Stolletz, and D. Briskorn (2011): A dynamic programming approach to the aircraft landing problem with aircraft classes. OR 2011, Zurich, Switzerland, September 2011 (supported by  Julius-Paul-Stiegler-Gedächtnis-Stiftung).

Zamorano, E. and R. Stolletz (2011): Heterogeneous workforce scheduling for check-in counters at airports. OR 2011, Zurich, Switzerland, September 2011.

Stolletz, R. (2011): Nurse activity scheduling with heterogeneous qualifications and time windows. Research Seminar, DTU Management Engineering, Lyngby, Denmark, August 2011.

Stolletz, R. (2011): Performance analysis of time-dependent loss-waiting queues. Applied Probability Society Conference 2011, Stockholm, Sweden, July 2011.

2010

Stolletz, R. (2010): Optimization of Stochastic Flow Lines using Exact Linear Programming Formulations. INFORMS Annual Meeting, Austin, Texas, USA, November 2010.

Stolletz, R. (2010): Approximation of Transient Performance Measures of Service Systems with Retrials. OR 2010, Munich, September 2010.

Stolletz, R. and D. Briskorn (2010): Scheduling of aircraft landings using aircraft classes. EURO 2010, Lisbon, Portugal, July 2010.

Stolletz, R. (2010): Approximation of transient performance measures of service systems with retrials. StochMod10, Nafplio, Greece, June 2010.

Stolletz, R. (2010): Optimization of fortnightly physician schedules with exible shifts. Research Seminar Health Care Management, University of Southern Denmark and Technical University of Denmark, Lyngby, Denmark, February 2010.

until 2009

Stolletz, R. (2009): Approximation of non-stationary service systems with retrials. INFORMS Annual Meeting, San Diego, USA, October 2009.

Stolletz, R. (2009): A Binary Programming Formulation for the Tour Scheduling Problem with Flexible Contracts. INFORMS International Conference on Service Science, Hong Kong, China, August 2009.

Stolletz, R. (2009): Analysis of two-level support systems with time-dependent overflow. A banking application. Symposium “Service Operations Management”, 71. Wissenschaftlichen Jahrestagung des Verbandes der Hochschullehrer für Betriebswirtschaft e.V., Nuremberg, June 2009.

Stolletz, R. (2009): Workforce planning for check-in agents. Research Seminar Airport Planning, Vrije Universiteit Amsterdam, Netherlands, January 2009.

Stolletz, R. (2008): Modeling Time-dependent Overflows in Call Centers. INFORMS Annual Meeting, Washington D.C., USA, October 2008.

Stolletz, R. (2008): Mixed-integer formulations for the tour scheduling problem at check-in counters. OR 2008, Augsburg, September 2008.

Stolletz, R. (2008): Non-stationary analysis of runway systems with generally distributed processing times. Guestlecture in Centrum Wiskunde & Informatica (CWI), Amsterdam, Netherlands, September 2008.

Stolletz, R. (2008): Analysis of a two-level call center with time-dependent overflow. Research Seminar, Vrije Universiteit Amsterdam, Netherlands, September 2008.

Stolletz, R. (2008): Check-in staffing: Categorization and modelling. XIIth Air Transport Research Society World Conference, Athen, Greece, July 2008.

Stolletz, R. (2008): Personaleinsatzplanung im Check-In. Münster Aviation Research Seminar, Universität Münster, June 2007.

Stolletz, R. and M. Manitz (2008): Mehrstufige Bearbeitungsprozesse mit wartezeitabhängigem Überlauf. Workshop zur Simulation und Leistungsbewertung von Fertigungssystemen, Technische Universität Dresden, April 2008.

Stolletz, R. (2007): Approximation of Non-Stationary Queueing Models. INFORMS Annual Meeting, Seattle, USA, November 2007.

Stolletz, R. (2007): Dynamic Analysis of Stochastic Runway Systems. XIth Air Transport Research Society World Conference, University of California, Berkeley, USA, June 2007.

Stolletz, R. (2007): Time-dependent and stochastic analysis of runways. Sitzung der Arbeitsgruppe Projektmanagement und Scheduling der Gesellschaft für Operations Research e.V. zum Thema Airport Operations Management, INFORM GmbH Aachen, April 2007.

Stolletz, R. (2007): Non-stationary Delay Analysis of Runway Systems. Airneth Annual Conference “Optimal use of scarce Airport Capacity”, Den Haag, Netherlands, April 2007.

Stolletz, R. and M. Manitz (2007): Analyse mehrstufiger Bearbeitungsprozesse mit Überlauf. Workshop zur Simulation und Leistungsbewertung von Fertigungssystemen, Technische Universität Dresden, March 2007.

Stolletz, R. (2006): Capacity and Delay Models of Runway Systems. OR 2006, Karlsruhe, September 2006.

Stolletz, R. (2006): Dynamic Analysis of Stochastic First-Come-First-Serve Runway Systems. ICNPAA: Mathematical Problems in Engineering and Aerospace Sciences, Budapest, Hungary, June 2006.

Stolletz, R. (2006): Kapazitäts- und Wartezeitanalyse von Landebahnsystemen. Doktoranden-Kolloquium Luftverkehr, Technische Universität Berlin, April 2006.

Stolletz, R. (2006): Dynamisch-stochastische Analyse von Single-Server-Modellen. Workshop zur Simulation und Leistungsbewertung von Fertigungssystemen, Technische Universität Dresden, January 2006.

Stolletz, R. (2005): Nonstationary Delay Analysis of Runway Systems with Arrival and Departure Banks. INFORMS Annual Meeting, San Francisco, USA, November 2005.

Stolletz, R. (2005): Nonstationary Delay Analysis of Runway Systems with Arrival and Departure Banks. IXth Air Transport Research Society World Conference, Rio de Janeiro, Brasil, July 2005.

Stolletz, R. (2005): Delay Performance at Congested Airports. Research Seminar in Aviation, GARS Workshop, Bremen, June 2005.

Stolletz, R. (2004): Approximative Analyse von dynamischen Warteschlangenmodellen. Workshop zur Simulation und Leistungsbewertung von Fertigungssystemen, Technische Universität Dresden, November 2004.

Stolletz, R. (2004): Approximation of the M(t)/M(t)/c(t)-Queue with Stationary Queueing Models and Backlog-Carryover. Annual Meeting of the INFORMS Society on Manufacturing and Service Operations Management (MSOM), Eindhoven, Netherlands, July 2004.

Stolletz, R. (2003): Performance Analysis and Optimization of Inbound Call Centers. OR 2003, Heidelberg, September 2003.

Stolletz, R. (2001): Leistungsbewertung von Inbound Call Centern mit Skill-Based-Routing. Workshop zur Simulation und Leistungsbewertung von Fertigungssystemen, Universität Würzburg, November 2001.

Stolletz, R. (2001): Leistungsanalyse von Call Center Konfigurationen mit flexiblen und spezialisierten Agenten. Workshop für quantitative Betriebswirtschaftslehre, Beilngries, October 2001.

Stolletz, R. (2001): Personalbedarfsplanung in Call Centern mit heterogenen Anrufer- und Agentengruppen. OR 2001, Duisburg, September 2001.

Stolletz, R. (2001): Ziele der Personalbedarfsplanung in Call Centern mit Skill-Based-Routing. Doktorandenworkshop, Clausthal-Zellerfeld, June 2001.

Stolletz, R. (2000): Probleme der Personaleinsatzplanung in Inbound Call Centern mit Skill-Based-Routing. Workshop für quantitative Betriebswirtschaftslehre, Bonn, October 2000.

Stolletz, R. (2000): Probleme der Personaleinsatzplanung in Inbound-Call Centern mit Skill-Based-Routing. Doktorandenworkshop der Technischen Universität Berlin, Blankensee, June 2000.

Stolletz, R. (1999): Call Center Analyse und Diffusionsapproximationen. Workshop für quantitative Betriebswirtschaftslehre, Clausthal-Zellerfeld, September 1999.