Publications (Excerpt)

2024

[182353]
Title: A Fleet Efficiency Factor for fleet size and mix problems using particle swarm optimisation.
Written by: Ehlers, Sören and Pache, Hannah and von Bock und Polach, Franz and Johnsen, Trond
in: <em>Ship Technology Research</em>. (2018).
Volume: <strong>2</strong>. Number: (3),
on pages: 1-11
Chapter:
Editor:
Publisher:
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1080/09377255.2018.1558612
URL:
ARXIVID:
PMID:

Note:

Abstract: Finding the optimal fleet composition under uncertainties is crucial for the economic success of a business. This paper presents the Fleet Efficiency Factor, a decision support tool for fleet size and mix problems and fleet composition problems. The method is based on a particle swarm optimisation algorithm combined with a stochastic model to include uncertainties into the decision-making progress. This combination allows selecting the best option out of a pool of available vessels, vehicles and aircrafts. Additionally, the FEF is based on the classical ship merit factor and thus capable of comparing different fleet compositions according to their economic efficiency, by describing the efficiency in a simple factor. A case study for the supply of an offshore platform in the high North is conducted. The approach proved to be flexible and applicable to different strategical and tactical planning problems in maritime transportation

2023

[182353]
Title: A Fleet Efficiency Factor for fleet size and mix problems using particle swarm optimisation.
Written by: Ehlers, Sören and Pache, Hannah and von Bock und Polach, Franz and Johnsen, Trond
in: <em>Ship Technology Research</em>. (2018).
Volume: <strong>2</strong>. Number: (3),
on pages: 1-11
Chapter:
Editor:
Publisher:
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1080/09377255.2018.1558612
URL:
ARXIVID:
PMID:

Note:

Abstract: Finding the optimal fleet composition under uncertainties is crucial for the economic success of a business. This paper presents the Fleet Efficiency Factor, a decision support tool for fleet size and mix problems and fleet composition problems. The method is based on a particle swarm optimisation algorithm combined with a stochastic model to include uncertainties into the decision-making progress. This combination allows selecting the best option out of a pool of available vessels, vehicles and aircrafts. Additionally, the FEF is based on the classical ship merit factor and thus capable of comparing different fleet compositions according to their economic efficiency, by describing the efficiency in a simple factor. A case study for the supply of an offshore platform in the high North is conducted. The approach proved to be flexible and applicable to different strategical and tactical planning problems in maritime transportation

2022

[182353]
Title: A Fleet Efficiency Factor for fleet size and mix problems using particle swarm optimisation.
Written by: Ehlers, Sören and Pache, Hannah and von Bock und Polach, Franz and Johnsen, Trond
in: <em>Ship Technology Research</em>. (2018).
Volume: <strong>2</strong>. Number: (3),
on pages: 1-11
Chapter:
Editor:
Publisher:
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1080/09377255.2018.1558612
URL:
ARXIVID:
PMID:

Note:

Abstract: Finding the optimal fleet composition under uncertainties is crucial for the economic success of a business. This paper presents the Fleet Efficiency Factor, a decision support tool for fleet size and mix problems and fleet composition problems. The method is based on a particle swarm optimisation algorithm combined with a stochastic model to include uncertainties into the decision-making progress. This combination allows selecting the best option out of a pool of available vessels, vehicles and aircrafts. Additionally, the FEF is based on the classical ship merit factor and thus capable of comparing different fleet compositions according to their economic efficiency, by describing the efficiency in a simple factor. A case study for the supply of an offshore platform in the high North is conducted. The approach proved to be flexible and applicable to different strategical and tactical planning problems in maritime transportation

2021

[182353]
Title: A Fleet Efficiency Factor for fleet size and mix problems using particle swarm optimisation.
Written by: Ehlers, Sören and Pache, Hannah and von Bock und Polach, Franz and Johnsen, Trond
in: <em>Ship Technology Research</em>. (2018).
Volume: <strong>2</strong>. Number: (3),
on pages: 1-11
Chapter:
Editor:
Publisher:
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1080/09377255.2018.1558612
URL:
ARXIVID:
PMID:

Note:

Abstract: Finding the optimal fleet composition under uncertainties is crucial for the economic success of a business. This paper presents the Fleet Efficiency Factor, a decision support tool for fleet size and mix problems and fleet composition problems. The method is based on a particle swarm optimisation algorithm combined with a stochastic model to include uncertainties into the decision-making progress. This combination allows selecting the best option out of a pool of available vessels, vehicles and aircrafts. Additionally, the FEF is based on the classical ship merit factor and thus capable of comparing different fleet compositions according to their economic efficiency, by describing the efficiency in a simple factor. A case study for the supply of an offshore platform in the high North is conducted. The approach proved to be flexible and applicable to different strategical and tactical planning problems in maritime transportation

2020

[182353]
Title: A Fleet Efficiency Factor for fleet size and mix problems using particle swarm optimisation.
Written by: Ehlers, Sören and Pache, Hannah and von Bock und Polach, Franz and Johnsen, Trond
in: <em>Ship Technology Research</em>. (2018).
Volume: <strong>2</strong>. Number: (3),
on pages: 1-11
Chapter:
Editor:
Publisher:
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1080/09377255.2018.1558612
URL:
ARXIVID:
PMID:

Note:

Abstract: Finding the optimal fleet composition under uncertainties is crucial for the economic success of a business. This paper presents the Fleet Efficiency Factor, a decision support tool for fleet size and mix problems and fleet composition problems. The method is based on a particle swarm optimisation algorithm combined with a stochastic model to include uncertainties into the decision-making progress. This combination allows selecting the best option out of a pool of available vessels, vehicles and aircrafts. Additionally, the FEF is based on the classical ship merit factor and thus capable of comparing different fleet compositions according to their economic efficiency, by describing the efficiency in a simple factor. A case study for the supply of an offshore platform in the high North is conducted. The approach proved to be flexible and applicable to different strategical and tactical planning problems in maritime transportation

2019

[182353]
Title: A Fleet Efficiency Factor for fleet size and mix problems using particle swarm optimisation.
Written by: Ehlers, Sören and Pache, Hannah and von Bock und Polach, Franz and Johnsen, Trond
in: <em>Ship Technology Research</em>. (2018).
Volume: <strong>2</strong>. Number: (3),
on pages: 1-11
Chapter:
Editor:
Publisher:
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1080/09377255.2018.1558612
URL:
ARXIVID:
PMID:

Note:

Abstract: Finding the optimal fleet composition under uncertainties is crucial for the economic success of a business. This paper presents the Fleet Efficiency Factor, a decision support tool for fleet size and mix problems and fleet composition problems. The method is based on a particle swarm optimisation algorithm combined with a stochastic model to include uncertainties into the decision-making progress. This combination allows selecting the best option out of a pool of available vessels, vehicles and aircrafts. Additionally, the FEF is based on the classical ship merit factor and thus capable of comparing different fleet compositions according to their economic efficiency, by describing the efficiency in a simple factor. A case study for the supply of an offshore platform in the high North is conducted. The approach proved to be flexible and applicable to different strategical and tactical planning problems in maritime transportation

2018

[182353]
Title: A Fleet Efficiency Factor for fleet size and mix problems using particle swarm optimisation.
Written by: Ehlers, Sören and Pache, Hannah and von Bock und Polach, Franz and Johnsen, Trond
in: <em>Ship Technology Research</em>. (2018).
Volume: <strong>2</strong>. Number: (3),
on pages: 1-11
Chapter:
Editor:
Publisher:
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1080/09377255.2018.1558612
URL:
ARXIVID:
PMID:

Note:

Abstract: Finding the optimal fleet composition under uncertainties is crucial for the economic success of a business. This paper presents the Fleet Efficiency Factor, a decision support tool for fleet size and mix problems and fleet composition problems. The method is based on a particle swarm optimisation algorithm combined with a stochastic model to include uncertainties into the decision-making progress. This combination allows selecting the best option out of a pool of available vessels, vehicles and aircrafts. Additionally, the FEF is based on the classical ship merit factor and thus capable of comparing different fleet compositions according to their economic efficiency, by describing the efficiency in a simple factor. A case study for the supply of an offshore platform in the high North is conducted. The approach proved to be flexible and applicable to different strategical and tactical planning problems in maritime transportation

2017

[182353]
Title: A Fleet Efficiency Factor for fleet size and mix problems using particle swarm optimisation.
Written by: Ehlers, Sören and Pache, Hannah and von Bock und Polach, Franz and Johnsen, Trond
in: <em>Ship Technology Research</em>. (2018).
Volume: <strong>2</strong>. Number: (3),
on pages: 1-11
Chapter:
Editor:
Publisher:
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1080/09377255.2018.1558612
URL:
ARXIVID:
PMID:

Note:

Abstract: Finding the optimal fleet composition under uncertainties is crucial for the economic success of a business. This paper presents the Fleet Efficiency Factor, a decision support tool for fleet size and mix problems and fleet composition problems. The method is based on a particle swarm optimisation algorithm combined with a stochastic model to include uncertainties into the decision-making progress. This combination allows selecting the best option out of a pool of available vessels, vehicles and aircrafts. Additionally, the FEF is based on the classical ship merit factor and thus capable of comparing different fleet compositions according to their economic efficiency, by describing the efficiency in a simple factor. A case study for the supply of an offshore platform in the high North is conducted. The approach proved to be flexible and applicable to different strategical and tactical planning problems in maritime transportation

2016

[182353]
Title: A Fleet Efficiency Factor for fleet size and mix problems using particle swarm optimisation.
Written by: Ehlers, Sören and Pache, Hannah and von Bock und Polach, Franz and Johnsen, Trond
in: <em>Ship Technology Research</em>. (2018).
Volume: <strong>2</strong>. Number: (3),
on pages: 1-11
Chapter:
Editor:
Publisher:
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1080/09377255.2018.1558612
URL:
ARXIVID:
PMID:

Note:

Abstract: Finding the optimal fleet composition under uncertainties is crucial for the economic success of a business. This paper presents the Fleet Efficiency Factor, a decision support tool for fleet size and mix problems and fleet composition problems. The method is based on a particle swarm optimisation algorithm combined with a stochastic model to include uncertainties into the decision-making progress. This combination allows selecting the best option out of a pool of available vessels, vehicles and aircrafts. Additionally, the FEF is based on the classical ship merit factor and thus capable of comparing different fleet compositions according to their economic efficiency, by describing the efficiency in a simple factor. A case study for the supply of an offshore platform in the high North is conducted. The approach proved to be flexible and applicable to different strategical and tactical planning problems in maritime transportation

2015

[182353]
Title: A Fleet Efficiency Factor for fleet size and mix problems using particle swarm optimisation.
Written by: Ehlers, Sören and Pache, Hannah and von Bock und Polach, Franz and Johnsen, Trond
in: <em>Ship Technology Research</em>. (2018).
Volume: <strong>2</strong>. Number: (3),
on pages: 1-11
Chapter:
Editor:
Publisher:
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1080/09377255.2018.1558612
URL:
ARXIVID:
PMID:

Note:

Abstract: Finding the optimal fleet composition under uncertainties is crucial for the economic success of a business. This paper presents the Fleet Efficiency Factor, a decision support tool for fleet size and mix problems and fleet composition problems. The method is based on a particle swarm optimisation algorithm combined with a stochastic model to include uncertainties into the decision-making progress. This combination allows selecting the best option out of a pool of available vessels, vehicles and aircrafts. Additionally, the FEF is based on the classical ship merit factor and thus capable of comparing different fleet compositions according to their economic efficiency, by describing the efficiency in a simple factor. A case study for the supply of an offshore platform in the high North is conducted. The approach proved to be flexible and applicable to different strategical and tactical planning problems in maritime transportation

2014

[182353]
Title: A Fleet Efficiency Factor for fleet size and mix problems using particle swarm optimisation.
Written by: Ehlers, Sören and Pache, Hannah and von Bock und Polach, Franz and Johnsen, Trond
in: <em>Ship Technology Research</em>. (2018).
Volume: <strong>2</strong>. Number: (3),
on pages: 1-11
Chapter:
Editor:
Publisher:
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1080/09377255.2018.1558612
URL:
ARXIVID:
PMID:

Note:

Abstract: Finding the optimal fleet composition under uncertainties is crucial for the economic success of a business. This paper presents the Fleet Efficiency Factor, a decision support tool for fleet size and mix problems and fleet composition problems. The method is based on a particle swarm optimisation algorithm combined with a stochastic model to include uncertainties into the decision-making progress. This combination allows selecting the best option out of a pool of available vessels, vehicles and aircrafts. Additionally, the FEF is based on the classical ship merit factor and thus capable of comparing different fleet compositions according to their economic efficiency, by describing the efficiency in a simple factor. A case study for the supply of an offshore platform in the high North is conducted. The approach proved to be flexible and applicable to different strategical and tactical planning problems in maritime transportation

2013

[182353]
Title: A Fleet Efficiency Factor for fleet size and mix problems using particle swarm optimisation.
Written by: Ehlers, Sören and Pache, Hannah and von Bock und Polach, Franz and Johnsen, Trond
in: <em>Ship Technology Research</em>. (2018).
Volume: <strong>2</strong>. Number: (3),
on pages: 1-11
Chapter:
Editor:
Publisher:
Series:
Address:
Edition:
ISBN:
how published:
Organization:
School:
Institution:
Type:
DOI: 10.1080/09377255.2018.1558612
URL:
ARXIVID:
PMID:

Note:

Abstract: Finding the optimal fleet composition under uncertainties is crucial for the economic success of a business. This paper presents the Fleet Efficiency Factor, a decision support tool for fleet size and mix problems and fleet composition problems. The method is based on a particle swarm optimisation algorithm combined with a stochastic model to include uncertainties into the decision-making progress. This combination allows selecting the best option out of a pool of available vessels, vehicles and aircrafts. Additionally, the FEF is based on the classical ship merit factor and thus capable of comparing different fleet compositions according to their economic efficiency, by describing the efficiency in a simple factor. A case study for the supply of an offshore platform in the high North is conducted. The approach proved to be flexible and applicable to different strategical and tactical planning problems in maritime transportation