Three Essays on Workforce Scheduling
22 April 2016
As part of the workforce planning process, workforce scheduling constitutes a crucial element in service operations management. Service providers need to efficiently allocate their employees to time slots to cover the time-dependent requirements driven by demand, while minimizing staffing costs. Our research deals with mixed integer programming and heuristic solution approaches for different stages of this planning process, such as shift and days-off scheduling and task assignment of a heterogeneous and multiskilled workforce. Some of our current projects deal with check-in counters' workforce scheduling at airports and technician scheduling for maintenance providers.
Zamorano, E., A. Becker, and R. Stolletz (2018): Task assignment with start time-dependent processing times for personnel at check-in counters. Journal of Scheduling, 21 (1), 93–109
Zamorano, E. and R. Stolletz (2017): Branch-and-price approaches for the Multiperiod Technician Routing and Scheduling Problem. European Journal of Operational Research, 257 (1), 55–68.
Stolletz, R. and E. Zamorano (2014): A rolling planning horizon heuristic for scheduling agents with different qualifications. Transportation Research Part E: Logistics and Transportation Review 68, 39-52.
Becker, A., E. Zamorano, and R. Stolletz (2015): Task assignment for personnel in check-in counters. Workshop on Workforce Planning, Mannheim, July 2015.
Zamorano, E. and R. Stolletz (2014): Multiperiod Technician Routing and Scheduling. 37. Südwest-Workshop Operations Research, Kaiserslautern, October 2014.
Zamorano, E. and R. Stolletz (2014): Multiperiod Technician Routing and Scheduling. Brownbag Seminar Operations Management & Operations Research, Mannheim, September 2014.
Zamorano, E. and R. Stolletz (2012): Optimal scheduling of agents with different qualifications at airport check-in counters. Brownbag Seminar Operations Management & Operations Research, Mannheim, November 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.
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).
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.
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.
Zamorano, E. (2011): Analysis of Skills Differentiations in the Workforce Scheduling Process for Check-In Counters. GESS Research Day, Mannheim, November 2011.
Zamorano, E. and R. Stolletz (2011): Heterogeneous workforce scheduling for check-in counters at airports. OR 2011, Zurich, Switzerland, September 2011.
Zamorano, E. (2011): Multi-skill Staff Scheduling with Stochastic Job Demand. CDSB Workshops, Mannheim, May 2011.
09/2010 – 07/2016
Doctoral candidate Operations & Information Systems, Center for Doctoral Studies in Business, University of Mannheim
09/2008 – 05/2010
Master of Engineering, Universidad Panamericana campus Guadalajara
09/2007 – 07/2008
Optimization of Productive Processes Specialization, Universidad Politécnica de Valencia
08/2006 – 12/2006
Corporate Social Responsibility exchange semester, University of Vermont
09/2003 – 05/2008
B.Sc. Industrial Engineering, Universidad Panamericana campus Guadalajara
“Mención honorífica” (honorable mention) for the Master's thesis “Heurística propuesta para el problema de asignación de aulas de la Universidad Panamericana Campus Guadalajara” (Proposed heuristic for the Classroom Assignment Problem in the Universidad Panamericana, Guadalajara campus) in 2010.
Scholarship of the Erich-Becker-Stiftung for the dissertation project “Quantitative decision support for workforce scheduling at airport check-in counters”, April 2014 – present.
Scholarship of the Graduate School of Economic & Social Sciences (GESS), University of Mannheim (funded by the German Research Foundation (DFG) as part of the 'Excellence Initiative'), September 2010 – October 2011.
09/2011 – 07/2016
Research Assistant, Chair of Production Management (Prof. Stolletz), University of Mannheim
02/2011 – 09/2011
Student Research Assistant, Chair of Production Management (Prof. Stolletz), University of Mannheim
07/2008 – 07/2010
Group Coordinator Industrial Engineering Program, Universidad Panamericana, Guadalajara, Mexico
11/2007 – 07/2008
MP&L Trainee, Ford Motor Company, Valencia, Spain
01/2003 – 08/2007
Operations Manager, Zamsa Acumuladores y Servicios, Guadalajara, Mexico