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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Den heliga Anden och vi har beslutat : En kvalitativ studie av konsensusmetoder i Equmeniakyrkans kyrkokonferens / ”It seemed good to the Holy Spirit and to us” : A qualitative study of the decision making methods in the annual conference of the Uniting Church in Sweden

Lillskog, Kim January 2019 (has links)
The aim of this study is to analyse the consensus decision making methods that are used at the annual conference of the Uniting Church in Sweden. The methods are analysed through the experiences of people that have attended the conference. Seven participants in the annual conference have been interviewed, and their expressed experiences have then been viewed through Anthony Giddens’ structuration theory, the theory of Jane Mansbridge et. al. regarding developments to the concept of deliberative democracy and through Paul Fiddes and his thoughts on finding the mind of Christ. The study concludes that the decision making methods has so far been well received and applied towards their objectives, though there is room for improvement.
12

Sustainable machinery and equipment investments : Incorporating the UN’s Sustainable Development Goals and sustainability criteria in the decision-making / Hållbara investeringar av maskiner och utrustningar : Implementering av FN:s hållbarhetsmål och miljökriterier i beslutsfattandet

Söderberg, John, Vesterberg, Emmy January 2022 (has links)
The growing environmental concerns are pressuring manufacturing companies to become more sustainable. The selection of machinery and equipment has a significant impact on environmental performance and is, therefore, essential to consider. This study aims to examine how machinery and equipment investments can become more environmentally sustainable by implementing the UN’s Sustainable Development Goals (SDGs) and environmental criteria through the use of decision-making methods. To fulfil the purpose of the study a case study was conducted at company operating within the manufacturing industry. Both semi-structured interviews and document gathering were used to collect data. Our analysis shows that it could be difficult to use multiple decision-making methods to incorporate SDGs and environmental criteria in the investment process because of the importance of being strict regarding certain technical criteria. Moreover, it was shown to be hard to prioritize environmental aspects because of the difficulty of finding adequate measures and its conflict with economic aspects. Our study suggests ways to strengthen the work towards the UN’s SDGs by including environmental criteria early in the investment process and by increasing the knowledge among the practitioners involved in the process. We conclude that many existing environmental criteria at companies can be connected to SDGs and that SDGs could be used as inspiration to find new criteria. Therefore, we conclude it might not be necessary to change the entire decision-making process. / Den växande oron kring miljön pressar tillverkningsföretag att bli mer hållbara. Valet av maskiner och utrustning har en betydande inverkan på miljön och är därför viktiga att se över. Denna studie syftar till att undersöka hur investeringar i maskiner och utrustning kan bli mer miljömässigt hållbara genom att implementera FN:s hållbarhetsmål och miljökriterier, med hjälp av beslutsfattande metoder. För att uppnå syftet med studie genomfördes en fallstudie på ett tillverkningsföretag. Semistrukturerade intervjuer och dokumentinsamling användes för att samla data för studien. Vår analys visar att det kan vara svårt att använda beslutsfattande metoder för att integrera FN:s hållbarhetsmål och miljökriterier i investeringsprocessen på grund av nödvändigheten av att vara strikt när det gäller särskilda tekniska kriterier. Det visade sig dessutom vara komplicerat att prioritera miljöaspekter på grund av svårigheten att hitta lämpliga mått samt konflikten mellan miljö- och ekonomiska aspekter. Vår studie föreslår alternativ för att förbättra arbetet mot att uppnå FN:s hållbarhetsmål genom att inkludera miljökriterier tidigt i investeringsprocessen och att öka kunskapen bland de anställda som är involverade i processen. Vår slutsats är att många befintliga miljökriterier på företag kan kopplas till FN:s hållbarhetsmål och att dessa mål kan användas som inspiration för att hitta nya kriterier. Därför drar vi slutsatsen att det eventuellt inte är nödvändigt att ändra hela beslutsprocessen för att uppnå hållbarhet i processen.
13

The sensitivity analysis of the quantitative multiple attribute decision making methods / Kiekybinių daugiatikslių sprendimo priėmimo metodų jautrumo analizė

Simanavičienė, Rūta 27 February 2012 (has links)
The problems, associated with sensitivity of quantitative multiattribute decision-making methods to the initial data and the reliability of the decision obtained by using these methods, are considered in the presented dissertaition. The methods discussed are applied to solving decision-making problems, consisting in the selection of one alternative out of the available several options, when a decision-making person seeks to achieve a number of aims, rather than a single aim, and the alternatives are evaluated based on a set of attribute, which may be conflicting. The research object is sensitivity of the popular quantitative multiattribute decision-making methods: TOPSIS, SAW and COPRAS to the initial data errors. The initial data inaccuracy may be caused by the errors made by a person, entering the data. The estimates of the alternatives may have some errors, which are not taken into account, when the considered methods are used with these data. The analysis of the related works has shown that there are methods for evaluating sensitivity with respect to one attribute, based on varying the significance values, such as the method of the most critical criterion (Triantaphyllou 2000) and to many attributes - Tornado diagram. However, these methods do not show either the errors of solution results or the reliability level of the result obtained. The main aim of the dissertation is the evaluation of the stochastic nature of multiattribute decision-making methods, based on... [to full text] / Disertacijoje nagrinėjamas kiekybinių daugiatikslių sprendimo priėmimo metodų jautrumas ir juos taikant gautų sprendimų patikimumas. Daugiatiksliai sprendimo priėmimo metodai taikomi sprendimo priėmimo uždaviniuose, renkantis vieną alternatyvą iš keleto galimų, kai sprendimą priimantis asmuo siekia ne vieno, o kelių tikslų, o alternatyvos vertinamos pagal daugelį efektyvumo rodiklių, kurie gali būti tarpusavyje prieštaraujantys (pvz. kainos ir naudos rodikliai). Pagrindinis tyrimo objektas yra metodų TOPSIS, SAW ir COPRAS jautrumas pradinių duomenų netikslumams. Duomenų netikslumai galimi dėl pradinių duomenų reikšmes nustatančio asmens padarytų klaidų. Tokiu atveju, kai taikant minėtus metodus, alternatyvų vertinimui naudojami pradiniais duomenys turintys tam tikras paklaidas, alternatyvų vertinimai gali būti su paklaidomis, kurios, taikant šiuos metodus, nebėra vertinamos. Išanalizavus susijusius darbus, nustatyta, jog yra metodų, skirtų vertinti sprendimo jautrumą vieno rodiklio atžvilgiu, keičiant reikšmingumo reikšmes, tai - kritiškiausio kriterijaus metodas (Triantaphyllou 2000) ir daugelio rodiklių atžvilgiu - Tornado diagrama. Tačiau šie metodai nepateikia nei sprendimo rezultatų paklaidų, nei rezultato patikimumo laipsnio. Pagrindinis disertacijos tikslas – įvertinti daugiatikslių, kiekybiniais matavimais pagrįstų sprendimo priėmimo metodų stochastiką. Sukurtų metodų taikymo sritis – sprendimo paramos sistemų projektavimas, sprendimų patikimumo ir sprendimų priėmimo... [toliau žr. visą tekstą]
14

An automated multi criteria assembly line design generation method for decision making support : an automotive case study / Ανάπτυξη μεθόδου λήψης αποφάσεων για τον σχεδιασμό συστημάτων παραγωγής : εφαρμογή στην αυτοκινητοβιομηχανία

Μίχαλος, Γεώργιος 14 February 2012 (has links)
The objective of the present study is the development of a method for the automated design of assembly lines using a multiple criteria approach. This method aims at supporting the decision making process during the early design stages as well as during the reconfiguration stages of assembly lines. Towards this target, a complete approach is proposed investigating the aspects of the design problem in both human and automation based assembly lines. At first, the current practices for design /reconfiguration of automated/ human based assembly lines were analysed and the decision making process was modelled in each case. Following the design problem was formulated in a way that allows its solution by the use of search algorithms which are easier and more efficient to apply. Models capable of systematically generating the alternative assembly lines designs were designed and implemented. An intelligent search algorithm was applied to these models allowing the efficient exploration of the design problem solution space and the fast identification of high quality design solutions with respect to several user defined criteria (such as investment cost, flexibility etc.). All the aforementioned were incorporated into two distinct software tools, having as objective the support of assembly line design and reconfiguration. The first tool incorporates the design model and algorithms in a standalone application that can automatically generate, simulate and evaluate alternative assembly lines designs based on the product structure and the available equipment and processes. The second tool was developed as a web based application that allows the reconfiguration of human based assembly lines through the concept of dynamic job rotation. The tool is able to derive alternative rotation schedules and evaluate them against criteria that are used for the case of human based assembly lines. The main outcome of this work is the complete method that was proposed and realized through software tools, which is capable of providing solutions for the design and reconfiguration of assembly lines. The method can assist design engineers in real time through the automated generation, evaluation and identification of high quality design alternatives. The evaluation of the case studies revealed the efficiency of the suggested approach to produce such designs and validated its applicability to industrial environments. / Το αντικείμενο αυτής της διατριβής είναι η ανάπτυξη μια πολυκριτηριδιακής μεθόδου για την αυτοματοποίηση της διαδικασίας σχεδιασμού γραμμών συναρμολόγησης. Η μέθοδος προορίζεται για την υποστήριξη της διαδικασίας λήψης αποφάσεων τόσο κατά τα αρχικά στάδια του σχεδιασμού όσο και κατά τον επανασχεδιασμό / αναδιαμόρφωση της γραμμής παραγωγής. Προς αυτή την κατεύθυνση προτείνεται μια ολοκληρωμένη προσέγγιση του προβλήματος η οποία εξετάζει τις ιδιαιτερότητες τόσο των αυτοματοποιημένων γραμμών συναρμολόγησης όσο και των γραμμών που απασχολούν ανθρώπινο δυναμικό. Αρχικά, ερευνήθηκαν οι σημερινές πρακτικές που χρησιμοποιούνται στο σχεδιασμό αυτοματοποιημένων συστημάτων παραγωγής αλλά και των γραμμών που βασίζονται στο ανθρώπινο δυναμικό. Κατόπιν οι διαδικασίες αυτές μοντελοποιούνται με αποτέλεσμα, την ανάπτυξη μοντέλων, τα οποία είναι ικανά να παράγουν με συστηματικό τρόπο εναλλακτικούς σχεδιασμούς μιας γραμμής συναρμολόγησης. Επιπρόσθετα, ένας ευφυής αλγόριθμος εφαρμόζεται στα μοντέλα αυτά, επιτρέποντας την αποδοτική και γρηγορότερη ανάδειξη σχεδιασμών υψηλής ποιότητας ως προς τα κριτήρια που έχει θέσει ο σχεδιαστής. Τα παραπάνω μοντέλα και ο αλγόριθμος αναζήτησης υλοποιήθηκαν σε δύο λογισμικά εργαλεία που αναπτύχθηκαν, με στόχο την στήριξη του σχεδιασμού γραμμών παραγωγής. Το πρώτο εργαλείο αποτελεί ένα αυτοτελές λογισμικό το οποίο έχει ως κύρια λειτουργία του την δημιουργία και αξιολόγηση εναλλακτικών σχεδιασμών αυτοματοποιημένων γραμμών παραγωγή, χρησιμοποιώντας ως εισόδους την δομή του προϊόντος και τον διαθέσιμο εξοπλισμό. Το δεύτερο εργαλείο χρησιμοποιεί την τεχνολογία των ιστοσελίδων (web interface) και χρησιμοποιείται για την δημιουργία χρονοπρογραμμάτων για τους εργάτες μιας γραμμής παραγωγής επιτρέποντας την αναδιαμόρφωση της σε σύντομο χρονικό διάστημα. Η ερευνητική συμβολή της παρούσας διατριβής έγκειται στην ανάπτυξη μεθόδου η οποία προσφέρει ολοκληρωμένη λύση για την υποστήριξη λήψης αποφάσεων κατά τον σχεδιασμό και την αναδιαμόρφωση γραμμών συναρμολόγησης και υλοποιείται μέσω των κατάλληλων εργαλείων λογισμικού. Η αξιολόγηση των περιπτώσεων της αυτοκινητοβιομηχανίας απέδειξε την αποδοτικότητα και εφαρμοσιμότητά της σε βιομηχανικό περιβάλλον.

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