Browsing by Author "Mustajoki, Jyri"

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A framework for assessing water security and the water-energy-food nexus-the case of Finland
(2019-05-01) Marttunen, Mika; Mustajoki, Jyri; Sojamo, Suvi; Ahopelto, Lauri; Keskinen, Marko
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Water security demands guaranteeing economic, social and environmental sustainability and simultaneously addressing the diversity of risks and threats related to water. Various frameworks have been suggested to support water security assessment. They are typically based on indexes enabling national comparisons; these may, however, oversimplify complex and often contested water issues. We developed a structured and systemic way to assess water security and its future trends via a participatory process. The framework establishes a criteria hierarchy for water security, consisting of four main themes: the state of the water environment; human health and well-being; the sustainability of livelihoods; and the stability, functions and responsibility of society. The framework further enables the analysis of relationships between the water security criteria as well as between water, energy and food security. The framework was applied to a national water security assessment of Finland in 2018 and 2030. Our experience indicates that using the framework collaboratively with stakeholders provides a meaningful way to improve understanding and to facilitate discussion about the state of water security and the actions needed for its improvement.
Interactive multi-criteria decision support : new tools and processes for practical applications
(2007-01-12) Mustajoki, Jyri
Doctoral dissertation (article-based)
This thesis studies and develops application procedures of multi-attribute value tree methods and related decision support systems. The objective is to understand the needs of practice for the process support and, through this, to help create user-friendly multi-criteria decision support systems and appropriate ways to use them. The motivation behind this is that the usability of the methods is strongly dependent on the available tools and on their application process. The recent advances on the development of computers and the Internet have also created new opportunities to develop the systems. Consequently, the role of computer support has become very process-oriented instead of only implementing the mathematics of the methods. Specifically, the thesis (i) introduces two new web-based systems, Web-HIPRE and Smart-Swaps, with focus on process support and on adopting the new opportunities of computer support, (ii) reports experiences on the use of these systems in environmental applications to support group decision making processes, and (iii) describes new ways to apply two specific methods, even swaps and preference programming, for various tasks with an aim to improve the practical applicability of these methods.
Parallel and comparative use of three multicriteria decision support methods in an environmental portfolio problem
(2023-06-01) Marttunen, Mika; Haara, Arto; Hjerppe, Turo; Kurttila, Mikko; Liesiö, Juuso; Mustajoki, Jyri; Saarikoski, Heli; Tolvanen, Anne
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Environmental management problems are often portfolio problems where the task is to find a set of actions that meets different objectives (e.g., the reduction of greenhouse gas emissions) and constraints (e.g., costs). We report experiences from deploying multiple operations research (OR) methods in a real decision-making setting and discuss the insights gained from this process. The applied methods were Multi-Attribute Value Theory (MAVT), the project portfolio selection tool Your Own Decision Aid (YODA) and Robust Portfolio Modelling (RPM). The methods were applied in a portfolio case evaluating three peatland rewetting options (“No action”, “Restoration”, “Damming”) for 79 drained peatland stands in an important recreational and nature conservation area in southern Finland. The pros and cons of the methods were evaluated, as well as their key methodological challenges, in a participatory environmental portfolio case. The applied methods yielded similar results in terms of the superiority of rewetting options. The strength of MAVT was its ability to highlight the strengths and weaknesses of all three rewetting options for a single peatland stand. YODA's strength was its simplicity and the possibility to apply it independently via the Internet. RPM made it possible to determine the priority of peatland stands within constraints, even without precise preference information. To our knowledge, this is the first systematic evaluation of three methods representing different ‘method categories’ (MAVT, multi-criteria elimination, portfolio decision analysis) applied to a real environmental problem.
A portfolio decision analysis approach for selecting a subset of interdependent actions: The case of a regional climate roadmap in Finland
(2024-02-20) Mustajoki, Jyri; Liesiö, Juuso; Kajanus, Miika; Eskelinen, Tuomo; Karkulahti, Saara; Kee, Taeyoung; Kesänen, Anni; Kettunen, Tapio; Wuorisalo, Jyri; Marttunen, Mika
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
In this paper, we present a structured approach based on portfolio decision analysis to support the consideration of interdependencies between actions (i.e. interactions) in the selection of an efficient portfolio. One of the main challenges in modelling interactions is that the possible number of them between the pairs of actions increases exponentially with the number of actions. In environmental management, the problems can include tens of possible actions potentially leading to hundreds of pairwise interactions between them. For example, a strategy for mitigating climate change can consist of various actions in different sectors for improving technology, reducing emissions and the sequestration of carbon. Our approach aims to reduce the burden of assessing interactions by initially selecting a shortlist of actions based on specific heuristics and focusing on modelling interactions exclusively within this chosen set of actions. Another feature of the approach is the use of holistic evaluation of interactions to further reduce the cognitive load of stakeholders making the assessment. As a possible disadvantage, these features may increase the imprecision related to the results of the model. To analyse the impacts of this imprecision, we propose a way to carry out sensitivity analysis on the basis of how intensively the interactions would be taken into account in the modelling. The applicability of the approach was tested in a case related to the roadmap to a carbon neutral North Savo region in Finland by the year 2035. The approach helped to better understand synergies and trade-offs when putting the actions of the roadmap into practice, which is expected to lead to better results in terms of preparedness and adaptation to climate change.
Web-HIPRE - A Multiattribute Decision Support System on the Internet
(1999) Mustajoki, Jyri
Helsinki University of Technology | Master's thesis
Työssä on toteutettu monitavoitteisen päätöksenteon tukijärjestelmä, Web-HIPRE, joka tarjoaa joukon päätösanalyyttisia menetelmiä päätöksenteon tukemiseen. Ohjelmointiin käytettiin Java-kieltä, mikä mahdollistaa ohjelmiston käyttämisen Internetin välityksellä. Web-HIPRE on ensimmäinen Internetissä maailmanlaajuisesti käytettävissä oleva päätösanalyyttinen ohjelmisto. Päätösanalyyttisista menetelmistä Web-HIPRE tukee analyyttista hierarkiaprosessia (AHP) sekä monitavoitteista arvopuuanalyysia (MAVT). Tietokonetuella on pyritty helpottamaan muun muassa arvopuiden visuaalista suunnittelua ja painotusta sekä tulosten laskentaa ja havainnollista analysointia. Internet mahdollistaa ohjelmiston käyttämisen etäältä, mikä avaa uusia mahdollisuuksia päätöksenteon tukemiseen. Ryhmäpäätöksenteon tukijärjestelmät tarvitsevat toimiakseen tietoverkon tiedon jakamista varten ja Internet sopii tähän tarkoitukseen hyvin. Ryhmän jäsenet voivat kommunikoida keskenään Internetin välityksellä, joten he voivat sijaita fyysisesti erillään toisistaan. Internetissä olevat WWW-sivut tarjoavat myös valtavan määrän tietoa, jota päätöksentekijät voivat käyttää hyväkseen vertaillessaan päätösvaihtoehtoja. Web-HIPRE tukee sekä yksittäisen päätöksentekijän että ryhmän päätöksentekoa. Ryhmäpäätöksenteon tuessa kukin päätöksentekijä voi analysoida tilanteen ensin itsenäisesti, jonka jälkeen vaihtoehtojen yksilöllisesti saadut painot voidaan yhdistää koko ryhmän painoiksi. Web-HIPRE -projektin tarkoitus oli luoda päätöksenteon tukijärjestelmä, joka käyttää Internetin tarjoamia mahdollisuuksia hyväkseen. Tältä kannalta projekti täyttää hyvin etukäteen asetetut odotukset. Kokonaisuudessaan projekti osoitti, että sekä ryhmäpäätöksenteon tukijärjestelmät että myös muunlaiset ryhmätyökalut on mahdollista toteuttaa maailmanlaajuisiksi hajautettuna Internetin toimiessa tiedonvälityskanavana. Web-HIPRE on käytettävissä WWW-osoitteessa http://www.hipre.hut.fi.