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1

A hierarchical facility layout planning approach for large and complex hospitals

Helber, Stefan, Böhme, Daniel, Oucherif, Farid, Lagershausen, Svenja, Kasper, Steffen

Journal:

Flexible Services and Manufacturing Journal

Year:

2016

Language:

english

File:

PDF, 1.17 MB

english, 2016

2

Location Planning for Dynamic Wireless Charging Systems for Electric Airport Passenger Buses

Helber, Stefan, Broihan, Justine, Jang, Young, Hecker, Peter, Feuerle, Thomas

Journal:

Year:

2018

Language:

english

File:

PDF, 1.68 MB

english, 2018

3

Dynamic capacitated lot-sizing problems: a classification and review of solution approaches

Lisbeth Buschkühl, Florian Sahling, Stefan Helber, Horst Tempelmeier

Journal:

Year:

2010

Language:

english

File:

PDF, 432 KB

english, 2010

4

A heuristic for dynamic multi-item multi-level capacitated lotsizing for general product structures

Horst Tempelmeier, Stefan Helber

Journal:

European Journal of Operational Research

Year:

1994

Language:

english

File:

PDF, 1.05 MB

english, 1994

5

[Operations Research Proceedings] Operations Research Proceedings 2012 || Competitive Ratio as Coherent Measure of Risk

Helber, Stefan, Breitner, Michael, Rösch, Daniel, Schön, Cornelia, Graf von der Schulenburg, Johann-Matthias, Sibbertsen, Philipp, Steinbach, Marc, Weber, Stefan, Wolter, Anja

Year:

2014

Language:

english

File:

PDF, 157 KB

english, 2014

6

Erfolgszielorientierte Agentenallokation in Inbound Call-Centern

Prof. Dr. Stefan Helber,Dr. Raik Stolletz…

Journal:

Schmalenbachs Zeitschrift für betriebswirtschaftliche Forschung

Year:

2005

Language:

german

File:

PDF, 330 KB

german, 2005

7

Using linear programming to analyze and optimize stochastic flow lines

Stefan Helber, Katja Schimmelpfeng, Raik Stolletz, Svenja Lagershausen

Journal:

Annals of Operations Research

Year:

2011

Language:

english

File:

PDF, 480 KB

english, 2011

8

[Operations Research Proceedings] Operations Research Proceedings 2012 || Forecasting Daily Highs and Lows of Liquid Assets with Neural Networks

Helber, Stefan, Breitner, Michael, Rösch, Daniel, Schön, Cornelia, Graf von der Schulenburg, Johann-Matthias, Sibbertsen, Philipp, Steinbach, Marc, Weber, Stefan, Wolter, Anja

Year:

2014

Language:

english

File:

PDF, 114 KB

english, 2014

9

Profit-oriented shift scheduling of inbound contact centers with skills-based routing, impatient customers, and retrials

Stefan Helber, Kirsten Henken

Journal:

Year:

2010

Language:

english

File:

PDF, 511 KB

english, 2010

10

[Operations Research Proceedings] Operations Research Proceedings 2012 ||

Helber, Stefan, Breitner, Michael, Rösch, Daniel, Schön, Cornelia, Graf von der Schulenburg, Johann-Matthias, Sibbertsen, Philipp, Steinbach, Marc, Weber, Stefan, Wolter, Anja

Year:

2014

Language:

english

File:

PDF, 12.49 MB

english, 2014

11

Quality- and profit-oriented scheduling of resource-constrained projects with flexible project structure via a genetic algorithm

Kellenbrink, Carolin, Helber, Stefan

Journal:

European J of Industrial Engineering

Year:

2016

Language:

english

File:

PDF, 1.82 MB

english, 2016

12

Profit-oriented scheduling of resource-constrained projects with flexible capacity constraints

Schnabel, André, Kellenbrink, Carolin, Helber, Stefan

Journal:

Business Research

Year:

2018

Language:

english

File:

PDF, 928 KB

english, 2018

13

Application of a real-world university-course timetabling model solved by integer programming

Katja Schimmelpfeng, Stefan Helber

Journal:

Year:

2007

Language:

english

File:

PDF, 232 KB

english, 2007

14

Simultaneous structuring and scheduling of multiple projects with flexible project structures

Hoffmann, Luise-Sophie, Kellenbrink, Carolin, Helber, Stefan

Journal:

Journal of Business Economics

Year:

2020

File:

PDF, 3.17 MB

2020

15

Quantitative approaches in production management

Helber, Stefan, de Kok, Ton, Kuhn, Heinrich, Manitz, Michael, Matta, Andrea, Stolletz, Raik

Journal:

Year:

2019

File:

PDF, 178 KB

2019

16

Setting Inventory Levels of CONWIP Flow Lines via Linear Programming

Helber, Stefan, Schimmelpfeng, Katja, Stolletz, Raik

Journal:

Business Research

Year:

2011

Language:

english

File:

PDF, 308 KB

english, 2011

17

Decomposition of unreliable assembly/disassembly networks with limited buffer capacity and random processing times

Journal:

European Journal of Operational Research

Year:

1998

Language:

english

File:

PDF, 1.45 MB

english, 1998

18

Performance analysis of an inbound call center with skills-based routing

Raik Stolletz, Stefan Helber

Journal:

Year:

2004

Language:

english

File:

PDF, 224 KB

english, 2004

19

A fix-and-optimize approach for the multi-level capacitated lot sizing problem

Stefan Helber, Florian Sahling

Journal:

International Journal of Production Economics

Year:

2010

Language:

english

File:

PDF, 201 KB

english, 2010

20

Lot sizing in capacitated production planning and control systems

Journal:

Year:

1995

Language:

english

File:

PDF, 1.50 MB

english, 1995

21

Dynamic capacitated lot sizing with random demand and dynamic safety stocks

Helber, Stefan, Sahling, Florian, Schimmelpfeng, Katja

Journal:

Year:

2013

Language:

english

File:

PDF, 594 KB

english, 2013

22

A Generic Approach to Analyze the Impact of a Future Aircraft Design on the Boarding Process

Yildiz, Bekir, Förster, Peter, Feuerle, Thomas, Hecker, Peter, Bugow, Stefan, Helber, Stefan

Journal:

Year:

2018

Language:

english

File:

PDF, 1017 KB

english, 2018

23

Editorial - Call Center Management

Stefan Helber, Karl-Heinz Waldmann

Journal:

Year:

2004

Language:

english

File:

PDF, 30 KB

english, 2004

24

Flexible vs. robust lot scheduling subject to random production yield and deterministic dynamic demand

Helber, Stefan, Inderfurth, Karl, Sahling, Florian, Schimmelpfeng, Katja

Journal:

IISE Transactions

Year:

2017

Language:

english

File:

PDF, 657 KB

english, 2017

25

Approximate analysis of unreliable transfer lines with splits in the flow of material

Journal:

Annals of Operations Research

Year:

2000

Language:

english

File:

PDF, 204 KB

english, 2000

26

[Operations Research Proceedings] Operations Research Proceedings 2012 || How Does Network Topology Determine the Synchronization Threshold in a Network of Oscillators?

Helber, Stefan, Breitner, Michael, Rösch, Daniel, Schön, Cornelia, Graf von der Schulenburg, Johann-Matthias, Sibbertsen, Philipp, Steinbach, Marc, Weber, Stefan, Wolter, Anja

Year:

2014

Language:

english

File:

PDF, 332 KB

english, 2014

27

Contributions to stochastic models of manufacturing and service operations

Liberopoulos, George, Heavey, Cathal, Helber, Stefan, Karaesmen, Fikri, Matta, Andrea

Journal:

IISE Transactions

Year:

2018

Language:

english

File:

PDF, 953 KB

english, 2018

28

Solving a multi-level capacitated lot sizing problem with multi-period setup carry-over via a fix-and-optimize heuristic

Florian Sahling, Lisbeth Buschkühl, Horst Tempelmeier, Stefan Helber

Journal:

Computers & Operations Research

Year:

2009

Language:

english

File:

PDF, 255 KB

english, 2009

29

Kapitalwertorientierte Pufferallokation in stochastischen Fließproduktionssystemen

Prof. Dr. Stefan Helber

Journal:

Schmalenbachs Zeitschrift für betriebswirtschaftliche Forschung

Year:

2000

Language:

german

File:

PDF, 278 KB

german, 2000

30

Simultaneous production and maintenance planning for a single capacitated resource facing both a dynamic demand and intensive wear and tear

Wolter, Anja, Helber, Stefan

Journal:

Central European Journal of Operations Research

Year:

2016

Language:

english

File:

PDF, 747 KB

english, 2016

31

Cash-flow-oriented buffer allocation in stochastic flow lines

Journal:

International Journal of Production Research

Year:

2001

Language:

english

File:

PDF, 497 KB

english, 2001

32

Scheduling resource-constrained projects with a flexible project structure

Kellenbrink, Carolin, Helber, Stefan

Journal:

European Journal of Operational Research

Year:

2015

Language:

english

File:

PDF, 990 KB

english, 2015

33

Decision support for rehabilitation hospital scheduling

Katja Schimmelpfeng, Stefan Helber, Steffen Kasper

Journal:

Year:

2012

Language:

english

File:

PDF, 244 KB

english, 2012

34

Analysis of flow lines with Cox-2-distributed processing times and limited buffer capacity

Journal:

Year:

2005

Language:

english

File:

PDF, 198 KB

english, 2005

35

Interaction of endothelin-1 with vasodilators: Effects of myocardial contractility and myocardial energy metabolism

Martin E. Beyer, Günther Slesak, Silke Kazmaier, Stefan Nerz, Uwe Helber, Hans Martin Hoffmeister

Journal:

Journal of the American College of Cardiology

Year:

1996

Language:

english

File:

PDF, 137 KB

english, 1996

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