---
_id: '10596'
abstract:
- lang: eng
  text: Multi-objective optimization is an active field of research that has many
    applications. Owing to its success and because decision-making processes are becoming
    more and more complex, there is a recent trend for incorporating many objectives
    into such problems. The challenge with such problems, however, is that the dimensions
    of the solution sets—the so-called Pareto sets and fronts—grow with the number
    of objectives. It is thus no longer possible to compute or to approximate the
    entire solution set of a given problem that contains many (e.g. more than three)
    objectives. On the other hand, the computation of single solutions (e.g. via scalarization
    methods) leads to unsatisfying results in many cases, even if user preferences
    are incorporated. In this article, the Pareto Explorer tool is presented—a global/local
    exploration tool for the treatment of many-objective optimization problems (MaOPs).
    In the first step, a solution of the problem is computed via a global search algorithm
    that ideally already includes user preferences. In the second step, a local search
    along the Pareto set/front of the given MaOP is performed in user specified directions.
    For this, several continuation-like procedures are proposed that can incorporate
    preferences defined in decision, objective, or in weight space. The applicability
    and usefulness of Pareto Explorer is demonstrated on benchmark problems as well
    as on an application from industrial laundry design.
article_type: original
author:
- first_name: Oliver
  full_name: Schütze, Oliver
  last_name: Schütze
- first_name: Oliver
  full_name: Cuate, Oliver
  last_name: Cuate
- first_name: Adanay
  full_name: Martín, Adanay
  last_name: Martín
- first_name: Sebastian
  full_name: Peitz, Sebastian
  id: '47427'
  last_name: Peitz
  orcid: https://orcid.org/0000-0002-3389-793X
- first_name: Michael
  full_name: Dellnitz, Michael
  last_name: Dellnitz
citation:
  ama: 'Schütze O, Cuate O, Martín A, Peitz S, Dellnitz M. Pareto Explorer: a global/local
    exploration tool for many-objective optimization problems. <i>Engineering Optimization</i>.
    2020;52(5):832-855. doi:<a href="https://doi.org/10.1080/0305215x.2019.1617286">10.1080/0305215x.2019.1617286</a>'
  apa: 'Schütze, O., Cuate, O., Martín, A., Peitz, S., &#38; Dellnitz, M. (2020).
    Pareto Explorer: a global/local exploration tool for many-objective optimization
    problems. <i>Engineering Optimization</i>, <i>52</i>(5), 832–855. <a href="https://doi.org/10.1080/0305215x.2019.1617286">https://doi.org/10.1080/0305215x.2019.1617286</a>'
  bibtex: '@article{Schütze_Cuate_Martín_Peitz_Dellnitz_2020, title={Pareto Explorer:
    a global/local exploration tool for many-objective optimization problems}, volume={52},
    DOI={<a href="https://doi.org/10.1080/0305215x.2019.1617286">10.1080/0305215x.2019.1617286</a>},
    number={5}, journal={Engineering Optimization}, author={Schütze, Oliver and Cuate,
    Oliver and Martín, Adanay and Peitz, Sebastian and Dellnitz, Michael}, year={2020},
    pages={832–855} }'
  chicago: 'Schütze, Oliver, Oliver Cuate, Adanay Martín, Sebastian Peitz, and Michael
    Dellnitz. “Pareto Explorer: A Global/Local Exploration Tool for Many-Objective
    Optimization Problems.” <i>Engineering Optimization</i> 52, no. 5 (2020): 832–55.
    <a href="https://doi.org/10.1080/0305215x.2019.1617286">https://doi.org/10.1080/0305215x.2019.1617286</a>.'
  ieee: 'O. Schütze, O. Cuate, A. Martín, S. Peitz, and M. Dellnitz, “Pareto Explorer:
    a global/local exploration tool for many-objective optimization problems,” <i>Engineering
    Optimization</i>, vol. 52, no. 5, pp. 832–855, 2020.'
  mla: 'Schütze, Oliver, et al. “Pareto Explorer: A Global/Local Exploration Tool
    for Many-Objective Optimization Problems.” <i>Engineering Optimization</i>, vol.
    52, no. 5, 2020, pp. 832–55, doi:<a href="https://doi.org/10.1080/0305215x.2019.1617286">10.1080/0305215x.2019.1617286</a>.'
  short: O. Schütze, O. Cuate, A. Martín, S. Peitz, M. Dellnitz, Engineering Optimization
    52 (2020) 832–855.
date_created: 2019-07-10T08:14:39Z
date_updated: 2022-01-06T06:50:46Z
department:
- _id: '101'
doi: 10.1080/0305215x.2019.1617286
intvolume: '        52'
issue: '5'
language:
- iso: eng
page: 832-855
publication: Engineering Optimization
publication_identifier:
  issn:
  - 0305-215X
  - 1029-0273
publication_status: published
status: public
title: 'Pareto Explorer: a global/local exploration tool for many-objective optimization
  problems'
type: journal_article
user_id: '47427'
volume: 52
year: '2020'
...
---
_id: '16659'
author:
- first_name: Maik
  full_name: Ringkamp, Maik
  last_name: Ringkamp
- first_name: Sina
  full_name: Ober-Blöbaum, Sina
  last_name: Ober-Blöbaum
- first_name: Michael
  full_name: Dellnitz, Michael
  last_name: Dellnitz
- first_name: Oliver
  full_name: Schütze, Oliver
  last_name: Schütze
citation:
  ama: Ringkamp M, Ober-Blöbaum S, Dellnitz M, Schütze O. Handling high-dimensional
    problems with multi-objective continuation methods via successive approximation
    of the tangent space. <i>Engineering Optimization</i>. 2012:1117-1146. doi:<a
    href="https://doi.org/10.1080/0305215x.2011.634407">10.1080/0305215x.2011.634407</a>
  apa: Ringkamp, M., Ober-Blöbaum, S., Dellnitz, M., &#38; Schütze, O. (2012). Handling
    high-dimensional problems with multi-objective continuation methods via successive
    approximation of the tangent space. <i>Engineering Optimization</i>, 1117–1146.
    <a href="https://doi.org/10.1080/0305215x.2011.634407">https://doi.org/10.1080/0305215x.2011.634407</a>
  bibtex: '@article{Ringkamp_Ober-Blöbaum_Dellnitz_Schütze_2012, title={Handling high-dimensional
    problems with multi-objective continuation methods via successive approximation
    of the tangent space}, DOI={<a href="https://doi.org/10.1080/0305215x.2011.634407">10.1080/0305215x.2011.634407</a>},
    journal={Engineering Optimization}, author={Ringkamp, Maik and Ober-Blöbaum, Sina
    and Dellnitz, Michael and Schütze, Oliver}, year={2012}, pages={1117–1146} }'
  chicago: Ringkamp, Maik, Sina Ober-Blöbaum, Michael Dellnitz, and Oliver Schütze.
    “Handling High-Dimensional Problems with Multi-Objective Continuation Methods
    via Successive Approximation of the Tangent Space.” <i>Engineering Optimization</i>,
    2012, 1117–46. <a href="https://doi.org/10.1080/0305215x.2011.634407">https://doi.org/10.1080/0305215x.2011.634407</a>.
  ieee: M. Ringkamp, S. Ober-Blöbaum, M. Dellnitz, and O. Schütze, “Handling high-dimensional
    problems with multi-objective continuation methods via successive approximation
    of the tangent space,” <i>Engineering Optimization</i>, pp. 1117–1146, 2012.
  mla: Ringkamp, Maik, et al. “Handling High-Dimensional Problems with Multi-Objective
    Continuation Methods via Successive Approximation of the Tangent Space.” <i>Engineering
    Optimization</i>, 2012, pp. 1117–46, doi:<a href="https://doi.org/10.1080/0305215x.2011.634407">10.1080/0305215x.2011.634407</a>.
  short: M. Ringkamp, S. Ober-Blöbaum, M. Dellnitz, O. Schütze, Engineering Optimization
    (2012) 1117–1146.
date_created: 2020-04-16T09:34:05Z
date_updated: 2022-01-06T06:52:54Z
department:
- _id: '101'
doi: 10.1080/0305215x.2011.634407
language:
- iso: eng
page: 1117-1146
publication: Engineering Optimization
publication_identifier:
  issn:
  - 0305-215X
  - 1029-0273
publication_status: published
status: public
title: Handling high-dimensional problems with multi-objective continuation methods
  via successive approximation of the tangent space
type: journal_article
user_id: '15701'
year: '2012'
...
---
_id: '16669'
author:
- first_name: Oliver
  full_name: Schütze, Oliver
  last_name: Schütze
- first_name: Massimiliano
  full_name: Vasile, Massimiliano
  last_name: Vasile
- first_name: Oliver
  full_name: Junge, Oliver
  last_name: Junge
- first_name: Michael
  full_name: Dellnitz, Michael
  last_name: Dellnitz
- first_name: Dario
  full_name: Izzo, Dario
  last_name: Izzo
citation:
  ama: Schütze O, Vasile M, Junge O, Dellnitz M, Izzo D. Designing optimal low-thrust
    gravity-assist trajectories using space pruning and a multi-objective approach.
    <i>Engineering Optimization</i>. 2009:155-181. doi:<a href="https://doi.org/10.1080/03052150802391734">10.1080/03052150802391734</a>
  apa: Schütze, O., Vasile, M., Junge, O., Dellnitz, M., &#38; Izzo, D. (2009). Designing
    optimal low-thrust gravity-assist trajectories using space pruning and a multi-objective
    approach. <i>Engineering Optimization</i>, 155–181. <a href="https://doi.org/10.1080/03052150802391734">https://doi.org/10.1080/03052150802391734</a>
  bibtex: '@article{Schütze_Vasile_Junge_Dellnitz_Izzo_2009, title={Designing optimal
    low-thrust gravity-assist trajectories using space pruning and a multi-objective
    approach}, DOI={<a href="https://doi.org/10.1080/03052150802391734">10.1080/03052150802391734</a>},
    journal={Engineering Optimization}, author={Schütze, Oliver and Vasile, Massimiliano
    and Junge, Oliver and Dellnitz, Michael and Izzo, Dario}, year={2009}, pages={155–181}
    }'
  chicago: Schütze, Oliver, Massimiliano Vasile, Oliver Junge, Michael Dellnitz, and
    Dario Izzo. “Designing Optimal Low-Thrust Gravity-Assist Trajectories Using Space
    Pruning and a Multi-Objective Approach.” <i>Engineering Optimization</i>, 2009,
    155–81. <a href="https://doi.org/10.1080/03052150802391734">https://doi.org/10.1080/03052150802391734</a>.
  ieee: O. Schütze, M. Vasile, O. Junge, M. Dellnitz, and D. Izzo, “Designing optimal
    low-thrust gravity-assist trajectories using space pruning and a multi-objective
    approach,” <i>Engineering Optimization</i>, pp. 155–181, 2009.
  mla: Schütze, Oliver, et al. “Designing Optimal Low-Thrust Gravity-Assist Trajectories
    Using Space Pruning and a Multi-Objective Approach.” <i>Engineering Optimization</i>,
    2009, pp. 155–81, doi:<a href="https://doi.org/10.1080/03052150802391734">10.1080/03052150802391734</a>.
  short: O. Schütze, M. Vasile, O. Junge, M. Dellnitz, D. Izzo, Engineering Optimization
    (2009) 155–181.
date_created: 2020-04-16T10:04:50Z
date_updated: 2022-01-06T06:52:54Z
department:
- _id: '101'
doi: 10.1080/03052150802391734
language:
- iso: eng
page: 155-181
publication: Engineering Optimization
publication_identifier:
  issn:
  - 0305-215X
  - 1029-0273
publication_status: published
status: public
title: Designing optimal low-thrust gravity-assist trajectories using space pruning
  and a multi-objective approach
type: journal_article
user_id: '15701'
year: '2009'
...
---
_id: '16667'
author:
- first_name: Oliver
  full_name: Schütze, Oliver
  last_name: Schütze
- first_name: Carlos A.
  full_name: Coello Coello, Carlos A.
  last_name: Coello Coello
- first_name: Sanaz
  full_name: Mostaghim, Sanaz
  last_name: Mostaghim
- first_name: El-Ghazali
  full_name: Talbi, El-Ghazali
  last_name: Talbi
- first_name: Michael
  full_name: Dellnitz, Michael
  last_name: Dellnitz
citation:
  ama: Schütze O, Coello Coello CA, Mostaghim S, Talbi E-G, Dellnitz M. Hybridizing
    evolutionary strategies with continuation methods for solving multi-objective
    problems. <i>Engineering Optimization</i>. 2008:383-402. doi:<a href="https://doi.org/10.1080/03052150701821328">10.1080/03052150701821328</a>
  apa: Schütze, O., Coello Coello, C. A., Mostaghim, S., Talbi, E.-G., &#38; Dellnitz,
    M. (2008). Hybridizing evolutionary strategies with continuation methods for solving
    multi-objective problems. <i>Engineering Optimization</i>, 383–402. <a href="https://doi.org/10.1080/03052150701821328">https://doi.org/10.1080/03052150701821328</a>
  bibtex: '@article{Schütze_Coello Coello_Mostaghim_Talbi_Dellnitz_2008, title={Hybridizing
    evolutionary strategies with continuation methods for solving multi-objective
    problems}, DOI={<a href="https://doi.org/10.1080/03052150701821328">10.1080/03052150701821328</a>},
    journal={Engineering Optimization}, author={Schütze, Oliver and Coello Coello,
    Carlos A. and Mostaghim, Sanaz and Talbi, El-Ghazali and Dellnitz, Michael}, year={2008},
    pages={383–402} }'
  chicago: Schütze, Oliver, Carlos A. Coello Coello, Sanaz Mostaghim, El-Ghazali Talbi,
    and Michael Dellnitz. “Hybridizing Evolutionary Strategies with Continuation Methods
    for Solving Multi-Objective Problems.” <i>Engineering Optimization</i>, 2008,
    383–402. <a href="https://doi.org/10.1080/03052150701821328">https://doi.org/10.1080/03052150701821328</a>.
  ieee: O. Schütze, C. A. Coello Coello, S. Mostaghim, E.-G. Talbi, and M. Dellnitz,
    “Hybridizing evolutionary strategies with continuation methods for solving multi-objective
    problems,” <i>Engineering Optimization</i>, pp. 383–402, 2008.
  mla: Schütze, Oliver, et al. “Hybridizing Evolutionary Strategies with Continuation
    Methods for Solving Multi-Objective Problems.” <i>Engineering Optimization</i>,
    2008, pp. 383–402, doi:<a href="https://doi.org/10.1080/03052150701821328">10.1080/03052150701821328</a>.
  short: O. Schütze, C.A. Coello Coello, S. Mostaghim, E.-G. Talbi, M. Dellnitz, Engineering
    Optimization (2008) 383–402.
date_created: 2020-04-16T10:01:07Z
date_updated: 2022-01-06T06:52:54Z
department:
- _id: '101'
doi: 10.1080/03052150701821328
language:
- iso: eng
page: 383-402
publication: Engineering Optimization
publication_identifier:
  issn:
  - 0305-215X
  - 1029-0273
publication_status: published
status: public
title: Hybridizing evolutionary strategies with continuation methods for solving multi-objective
  problems
type: journal_article
user_id: '15701'
year: '2008'
...
