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  • 1.
    Barrera Diaz, Carlos Alberto
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Volvo Cars Corporation Skövde.
    Discrete event simulation data management2016Självständigt arbete på avancerad nivå (magisterexamen), 15 poäng / 22,5 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Simulation is one of the most important decision support tools that has been present during decades in the manufacturing industry. Discrete Event Simulation (DES) experiments analysis is an important engineering activity for efficient production. In order to improve this efficiency, many companies must develop a supporting framework, between engineers and the process information. Within DES it is also important the model provenance information because it validates the credibility of the model to be reused. Therefore, nowadays there is a great interest in the simulation community based on the reusability of the simulation models. The engineers at Volvo Cars Corporation (VCC) who work with DES technology, request and deliver a high number of Key Performance Indicators (KPIs). As a consequence it is difficult to present the simulation results in a standardized way. This thesis has investigated a way to reduce and standardize this time consuming process. Thus, by the study of what information and data must be documented and how it must be presented, the main goal of this thesis was to improve the efficiency of a company, when a DES project is being developed. A survey based on VCC simulation projects, was undertaken with the aim to find the output data and the information that must be included in a standardized report. First, the information of the projects was categorized in three main groups: general information, input data and output data. Within these groups, the provenance metadata which allows the reuse of the DES project, was identified. Then, after the analysis of 23 reports from DES projects, most frequent scenarios and their related output data were identified. All the findings were used for the implementation of a standardized and automated data-handling system which simplify the project documentation task to the engineers. This data-handling system exports the key output data from the simulation software to the report designed. Validation interviews show a strong acceptance among the engineers at VCC. Finally, in order to properly keep in track with all the provenance information when a DES project is being performed, a management method was proposed as well.

  • 2.
    Barrera Diaz, Carlos Alberto
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Oscarsson, Jan
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Lidberg, Simon
    Volvo Car Corporation, Skövde, Sweden.
    Sellgren, Tommy
    Volvo Car Corporation, Skövde, Sweden.
    A Study of Discrete Event Simulation Project Data and Provenance Information Management in an Automotive Manufacturing Plant2017Ingår i: Proceedings of the 2017 Winter Simulation Conference / [ed] W. K. V. Chan, A. D’Ambrogio, G. Zacharewicz, N. Mustafee, G. Wainer, E. Page, IEEE, 2017, , s. 12s. 4012-4023Konferensbidrag (Refereegranskat)
    Abstract [en]

    Discrete Event Simulation (DES) project data management is a complex and important engineering activity which impacts on an organization’s efficiency. This efficiency could be decreased by the lack of provenance information or the unreliability of existing information regarding previous simulation projects, all of which complicates the reusability of the existing data. This study presents an analysis of the management of simulation projects and their provenance data, according to the different types of scenarios usually found at a manufacturing plant. A survey based on simulation projects at an automotive manufacturing plant was conducted, in order to categorize the information regarding the studied projects, map the available provenance data and standardize its management. This study also introduces an approach that demonstrates how a structured framework based on the specific data involved in the different types of scenarios could allow an improvement of the management of DES projects.

  • 3.
    Flores Ramos, Bruno
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap.
    Urnieta Ormazabal, Mikel
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap.
    Suitability of a virtual commissioning model for energy optimization of a gantry robot2019Självständigt arbete på grundnivå (kandidatexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Manufacturing production systems are increasingly forced to join the path of sustainability regarding their typical room for improvement in terms of clean technology and energy usage. However, implementing these eco-friendly measures on facilities is a double-edged sword since the results are not usually guaranteed and could end up being extra energy wastages. Even though nowadays it is usually made for sequence fixing and training tasks, virtual commissioning comes alternatively into action showing up to test energy optimization attempts preventing the premature execution issues that could happen.

    This project has developed a VC model of a gantry crane system from a Volvo operation including energy consumption monitoring, aiming to test its suitability on energy optimization tasks. The development has been accomplished following the design and creation methodology through the use of Matlab, Codesys and Simumatik 3D and quantitative results are given specifically from different energy modeling drafts until reaching the closest result to the real system consumption. Once the true to reality model was developed, the optimization test was carried out decreasing the maximum velocity of the system behavior to see the energy consumption variation. This constitutes the ultimate test and its results are discussed coming into the conclusion that the VC model is suitable for energy optimization of the treated operation but would require reconfigurations for aggressive velocity changes.

  • 4.
    Gkaris, Konstantinos
    Högskolan i Skövde, Institutionen för informationsteknologi.
    First Person Exposure therapy for acrophobia2017Självständigt arbete på avancerad nivå (magisterexamen), 15 poäng / 22,5 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This thesis is focused on the development of games as a treatment for people who suffer from acrophobia, the fear of being in high-heighted situations. The purpose is to look over the immediate reactions of the players and study what effect first person gaming has on them in a short term. To achieve this, a series of three mini games is employed. Each game corresponds to a level. The first level is a tutorial which makes the player familiar with the game. In the second level, players are required to do a simple task. Finally, in the third level, the task is more pressuring and players need to be quicker to achieve the necessary goals.

    What is expected from this study is that the full control of the playable character makes the players feel immersed. Additionally, as the game progresses, the players will be more comfortable with heights. Last but not least, it is assumed that fast pace enhances immersion, a major factor of this study.

    As a result of our experiment, it is demonstrated that the control of the character from the player is a great tactic for immersion. Furthermore, it shows that the players start feeling better with heights even after one session. Finally, the study indicates that the fast pace enhances immersion, but over the time the increase of the pace has lower impact. These statements come as a result from the answers of the experiment‟s participants and will be shown in detail in this paper.

  • 5.
    Goienetxea Uriarte, Ainhoa
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Ng, Amos H. C.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system. Department of Industrial Engineering and Management, School of Engineering, Jönköping University, Sweden.
    Ruiz Zúñiga, Enrique
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Urenda Moris, Matías
    Department of Industrial Engineering and Management, School of Engineering, Jönköping University, Sweden.
    Improving the Material Flow of a Manufacturing Company via Lean, Simulation and Optimization2017Ingår i: Proceedings of the International Conference on Industrial Engineering and Engineering Management, IEEM2017, IEEE, 2017, s. 1245-1250Konferensbidrag (Refereegranskat)
    Abstract [en]

    Companies are continuously working towards system and process improvement to remain competitive in aglobal market. There are different methods that support companies in the achievement of that goal. This paper presents an innovative process that combines lean, simulation and optimization to improve the material flow of a manufacturing company. A description of each step of the process details the lean tools and principles taken into account, as well as the results achieved by the application of simulation and optimization.The project resulted in an improved layout and material flow that employs an automated guided vehicle. In addition, lean wastes related to transport, inventory levels as well as waiting times were reduced. The utilization of the process that combines lean, simulation and optimization was considered valuable for the success of the project.

  • 6.
    Goienetxea Uriarte, Ainhoa
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Ng, Amos H. C.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system. Department of Industrial Engineering and Management, School of Engineering, Jönköping University, Sweden.
    Urenda Moris, Matias
    Department of Industrial Engineering and Management, School of Engineering, Jönköping University, Sweden.
    Jägstam, Mats
    Department of Industrial Engineering and Management, School of Engineering, Jönköping University, Sweden.
    Lean, Simulation and Optimization: A maturity model2017Ingår i: Proceedings of the International Conference on Industrial Engineering and Engineering Management, IEEM2017, IEEE, 2017, s. 1310-1315Konferensbidrag (Refereegranskat)
    Abstract [en]

    This article presents a maturity model that can be applied to support organizations in identifying their current state and guiding their further development with regard to lean, simulation and optimization. The paper identifies and describes different maturity levels and offers guidelines that explain how organizations can grow from lower to higher levels of maturity. In addition, it attempts to provide the starting point for organizations that have applied lean or are willing to implement it and which may also be considering taking decisions in a more efficient way via simulation and optimization.

  • 7.
    Goienetxea Uriarte, Ainhoa
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Ruiz Zúñiga, Enrique
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Urenda Moris, Matías
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Ng, Amos H. C.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Karlberg, Catarina
    Monitoring and Analysis Area, Health Department of Västra Götaland, Skövde, Sweden.
    Wallqvist, Pierre
    Monitoring and Analysis Area, Health Department of Västra Götaland, Skövde, Sweden.
    Improved system design of an emergency department through simulation-based multiobjective-optimization2014Konferensbidrag (Refereegranskat)
    Abstract [en]

    Healthcare facilities, and especially emergency departments (ED), are usually characterized by its complexity due to the variability and stochastic nature of the processes involved in the system. The combination of different flows of patients, staff and resources also increments the complexity of this kind of facilities. In order to increase its efficiency, many researchers have proposed discrete-event simulation (DES) as a powerful improvement tool. However, DES can be a limited approach in the case a simulation model has too many combinations of input parameters, complex correlations between the input and output parameters and different objective functions. Hence, to find the best configuration of a complex system, an approach combining DES and meta-heuristic optimization becomes an even more powerful improvement technique. Simulation-based multiobjective-optimization (SMO) is a promising approach to generate multiple trade-off solutions particularly when multiple conflicting objectives exist within a complex system. The generated solutions provide decision makers with feasible and optimal alternatives to improve, modify or design healthcare systems. The aim of this paper is to present the work done at the ED of the regional Hospital of Skövde in Sweden, where SMO implemented in modeFromtier has been successfully applied. The result and methodology present a successful approach for decision makers in healthcare systems to reduce the waiting time of patients saving considerable time, money and resources.

  • 8.
    Jarke, Matthias
    et al.
    RWTH Aachen University & Fraunhofer FIT, Germany.
    Jeusfeld, Manfred
    Tilburg University, Netherlands.
    Quix, Christoph
    RWTH Aachen University & Fraunhofer FIT, Germany .
    Vassiliadis, Panos
    University of Ioannina, Greece .
    Vassiliou, Yanis
    National Technical University of Athens, Greece.
    Data Warehouse Architecture and Quality: Impact and Open Challenges2013Ingår i: Seminal Contributions to Information Systems Engineering / [ed] Janis Bubenko, John Krogstie, Oscar Pastor, Barbara Pernici, Colette Rolland, Arne Sølvberg, Berlin Heidelberg: Springer Berlin/Heidelberg, 2013, s. 183-189Kapitel i bok, del av antologi (Övrig (populärvetenskap, debatt, mm))
    Abstract [en]

    The CAiSE 98 paper “Architecture and Quality in Data Warehouses” and its ex-panded journal version (Jarke et al. 1999) was the first to add a Zachman-like(Zachman 1987) explicit conceptual enterprise modeling perspective to the archi-tecture of data warehouses. Until then, data warehouses were just seen as collec-tions of – typically multidimensional and historized – materialized views on rela-tional tables, without consideration of modeling of the (business) conceptsunderlying their structure. The paper pointed out that this additional conceptualperspective was not just necessary for a truly semantic data integration but also aprerequisite for bringing the then very active data warehouse movement togetherwith another topic of quickly growing importance, that of data quality.

  • 9.
    Jiang, Yuning
    et al.
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Atif, Yacine
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Ding, Jianguo
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Cyber-Physical Systems Security Based on A Cross-Linked and Correlated Vulnerability Database2019Konferensbidrag (Refereegranskat)
    Abstract [en]

    Recent advances in data analytics prompt dynamic datadriven vulnerability assessments whereby data contained from vulnerabilityalert repositories as well as from Cyber-physical System (CPS) layer networks and standardised enumerations. Yet, current vulnerability assessment processes are mostly conducted manually. However, the huge volume of scanned data requires substantial information processing and analytical reasoning, which could not be satisfied considering the imprecision of manual vulnerability analysis. In this paper, we propose to employ a cross-linked and correlated database to collect, extract, filter and visualise vulnerability data across multiple existing repositories, whereby CPS vulnerability information is inferred. Based on our locally-updated database, we provide an in-depth case study on gathered CPS vulnerability data, to explore the trends of CPS vulnerability. In doing so, we aim to support a higher level of automation in vulnerability awareness and back risk-analysis exercises in critical infrastructures (CIs) protection.

  • 10.
    Jiang, Yuning
    et al.
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Atif, Yacine
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Ding, Jianguo
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Multi-Level Vulnerability Modeling of Cyber-Physical Systems2018Konferensbidrag (Refereegranskat)
    Abstract [en]

    Vulnerability is defined as ”weakness of an asset or control that can be exploited by a threat” according to ISO/IEC 27000:2009, and it is a vital cyber-security issue to protect cyber-physical systems (CPSs) employed in a range of critical infrastructures (CIs). However, how to quantify both individual and system vulnerability are still not clear. In our proposed poster, we suggest a new procedure to evaluate CPS vulnerability. We reveal a vulnerability-tree model to support the evaluation of CPS-wide vulnerability index, driven by a hierarchy of vulnerability-scenarios resulting synchronously or propagated by tandem vulnerabilities throughout CPS architecture, and that could be exploited by threat agents. Multiple vulnerabilities are linked by boolean operations at each level of the tree. Lower-level vulnerabilities in the tree structure can be exploited by threat agents in order to reach parent vulnerabilities with increasing CPS criticality impacts. At the asset-level, we suggest a novel fuzzy-logic based valuation of vulnerability along standard metrics. Both the procedure and fuzzy-based approach are discussed and illustrated through SCADA-based smart power-grid system as a case study in the poster, with our goal to streamline the process of vulnerability computation at both asset and CPS levels.

  • 11.
    Jiang, Yuning
    et al.
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Atif, Yacine
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Ding, Jianguo
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Wang, Wei
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    A Semantic Framework With Humans in the Loop for Vulnerability-Assessment in Cyber-Physical Production Systems2019Konferensbidrag (Refereegranskat)
    Abstract [en]

    Criticalmanufacturingprocessesinsmartnetworkedsystems such as Cyber-Physical Production Systems (CPPSs) typically require guaranteed quality-of-service performances, which is supported by cyber- security management. Currently, most existing vulnerability-assessment techniques mostly rely on only the security department due to limited communication between di↵erent working groups. This poses a limitation to the security management of CPPSs, as malicious operations may use new exploits that occur between successive analysis milestones or across departmental managerial boundaries. Thus, it is important to study and analyse CPPS networks’ security, in terms of vulnerability analysis that accounts for humans in the production process loop, to prevent potential threats to infiltrate through cross-layer gaps and to reduce the magnitude of their impact. We propose a semantic framework that supports the col- laboration between di↵erent actors in the production process, to improve situation awareness for cyberthreats prevention. Stakeholders with dif- ferent expertise are contributing to vulnerability assessment, which can be further combined with attack-scenario analysis to provide more prac- tical analysis. In doing so, we show through a case study evaluation how our proposed framework leverages crucial relationships between vulner- abilities, threats and attacks, in order to narrow further the risk-window induced by discoverable vulnerabilities.

  • 12.
    Karavatos, Athanasios
    Högskolan i Skövde, Institutionen för informationsteknologi.
    “WHAT IS YOUR DPS, HERO?”: Ludonarrative dissonance and player perception of story and mechanics in MMORPGs.2017Självständigt arbete på avancerad nivå (magisterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This thesis studies the MMORPGs and the ludonarrative dissonance that exist in the complexity of their design. Given the massive multiplayer nature of these games, players of different ambitions and gameplay preference need to coexist, which is a massive challenge for both the players themselves and the designers of these worlds. The balance of these two major aspects of the game, what affects the players and this tension, is the focal point of this thesis. By conducting a survey through various MMORPG player bases, this thesis concludes that this tension is not only a balance between narrative and mechanics but of other aspect as well. These aspects, intertextuality and community, this thesis argues, are the extra aspects that are tight connected with the balancing of narrative and mechanics in a MMORPG and the creation of these complex games and world. All these aspects are affected by the design decisions and affecting of how the players perceive the game world.

  • 13.
    Ladrón de Guevara Muñoz, M. Carmen
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap.
    Martín Márquez, Javier
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap.
    Mini-grid system study applied to a stand-alone house located in Málaga, Spain2015Självständigt arbete på grundnivå (kandidatexamen), 15 poäng / 22,5 hpStudentuppsats (Examensarbete)
    Abstract [en]

    A study of an off-grid photovoltaic system for the electrification of a stand-alone single residential house in a rural area located in the city of Málaga, Spain, is presented. The load of an average family house is analysed keeping in mind the available solar energy at this location. A preliminary sizing of the system is carried out considering predefined values for the efficiency of the different technologies employed in the system: photovoltaic (PV) array, batteries as energy storages, inverters to convert the energy obtained from the sun, and diesel gensets to ensure supply under any circumstances. Later, precise brands of the available technologies in the market are selected, and the system is re-sized using the new parameters. The life cycle cost of the mini-grid (MG) system shows that the amortization of the system in 20 years for a stand-alone house is not possible. Although it is not confirmed that 20 years will be sufficient to make the system profitable, other aspects are considered and discussed in terms of their feasibility in Málaga.

  • 14.
    Montebelli, Alberto
    et al.
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Ruaro, Elisabetta
    Torre, Vincent
    Towards the neurocomputer2001Konferensbidrag (Refereegranskat)
  • 15.
    Ruiz Zúñiga, Enrique
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    A simulation-based approach for optimization of production logistics with consideration to production layout: Research Proposal2016Rapport (Övrigt vetenskapligt)
    Abstract [en]

    Manufacturing sectors in Sweden have a long tradition and represent a significant share of the national gross domestic product and the export values. Most of the Swedish manufacturing companies have gone through a modernization and adaptation process in order to be able to compete on a globalized market. Many plants, however, still have non-optimized shop floors as a consequence of adaptations over time without redesigning its production and logistics flows and with a lack of an overall strategy. To support the optimization of shop floors, this project suggests the combined use of Discrete-Event Simulation (DES) and Simulation-Based Multi-objective Optimization (SBO) under the umbrella of a design and creation research strategy. The aim of the project is to support the improvement and optimization of high product mix and a low-volume of customized products manufacturing systems by considering production and logistics flows along with the shop floor layout. The methodology is intended to contribute to significantly increase the productivity and efficiency of the Swedish manufacturing industry and help companies to survive on the globalized market. The potential results can serve for decision makers and stakeholders to apply changes and adaptations in the system considering the mid and long term goals of the company. Going through different case studies implemented in a middle-size water pumps manufacturer, this methodology will be useful in practice and it will provide a decision support system for this specific industrial partner and will serve as a guideline for other manufacturing companies.

  • 16.
    Ruiz Zúñiga, Enrique
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Flores García, Erik
    Innovation and Product Realisation, Mälardalen University.
    Urenda Moris, Matías
    Division of Industrial Engineering and Management, Uppsala University.
    Syberfeldt, Anna
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Challenges of Simulation-based Optimization in Facility Layout Design of Production Systems2019Ingår i: Advances in Manufacturing Technology XXXIII: Proceedings of the 17th International Conference on Manufacturing Research, incorporating the 34th National Conference on Manufacturing Research, September 10–12, 2019, Queen’s University Belfast, UK / [ed] Yan Jin, Mark Price, Amsterdam: IOS Press, 2019, Vol. 9, s. 507-512Konferensbidrag (Refereegranskat)
    Abstract [en]

    Facility layout design (FLD) is becoming more challenging than ever. In particular, modern day manufacturing industry requires advancing from a traditional approach of mass production to one of mass customization including increased flexibility and adaptability. There are several software tools that can support facility layout design among which simulation and optimization are the most powerful – especially when the two techniques are combined into simulation-based optimization (SBO). The aim of this study is to identify the challenges of SBO in FLD of production systems. In doing so, this paper uncovers the challenges of SBO and FLD, which are so far addressed in separate streams of literature. The results of this study present two novel contributions based on two case studies in the Swedish manufacturing industry. First, that challenges of SBO in FLD, previously identified in literature, do not hold equal importance in industrial environments. Our results suggest that challenges in complexity, data noise, and standardization take precedence over challenges of SBO in FLD previously reported in literature. Second, that the origin of challenges of SBO in FLD are not technological in nature, but stem from the increased complexity of factories required in modern day manufacturing companies.

  • 17.
    Ruiz Zúñiga, Enrique
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Urenda Moris, Matias
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Syberfeldt, Anna
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Integrating Simulation-Based Optimization, Lean, and the Concepts of Industry 4.02017Ingår i: Proceedings of the 2017 Winter Simulation Conference / [ed] W. K. V. Chan, A. D'Ambrogio, G. Zacharewicz, N. Mustafee, G. Wainer, E. Page, IEEE, 2017, s. 3828-3839Konferensbidrag (Refereegranskat)
    Abstract [en]

    Nowadays, due to the need of innovation and adaptation for the mass production of customized goods,many industries are struggling to compete with the manufacturing sector emerging in different countriesaround the world. The understanding and implementation of different improvement techniques isnecessary in order to take part in the so-called fourth industrial revolution, Industry 4.0. This paperinvestigates how two well-known improvement approaches, namely lean and simulation-basedoptimization, can be combined with the concepts of Industry 4.0 to improve efficiency and avoid movingproduction to other countries. Going through an industrial case study, the paper discusses how such acombination could be carried out and how the different strengths of the three approaches can be utilizedtogether. The case study focuses on how the efficiency of a production site can be increased and howIndustry 4.0 can support the improvement of the internal logistics on the shop floor.

  • 18.
    Ruiz Zúñiga, Enrique
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Urenda Moris, Matías
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Syberfeldt, Anna
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    A simulation-based multi-objective optimization approach for production and logistics considering the production layout2016Ingår i: Proceedings of the 7th Swedish Production Symposium, 2016Konferensbidrag (Refereegranskat)
    Abstract [en]

    Manufacturing sectors in Sweden have a long tradition and represent a significant share of the national gross domestic product and the export values. Most of the Swedish manufacturing companies have gone through a modernization and adaptation process in order to be able to compete on a globalized market. Many plants, however, still have non-optimized shop floors as a consequence of the shop floors being adapted over time without redesigning its production and logistics flows and with a lack of an overall strategy. To support the optimization of shop floors, this paper suggests the combined use of Discrete-Event Simulation and Simulation-Based Multi-objective Optimization. The aim of the paper is to analyze a simulation methodology that supports the optimization of shop floors by considering production and logistics flows along with the shop floor layout. The methodology is intended to contribute to significantly increase the productivity and efficiency of the Swedish manufacturing industry and help companies to survive on the globalized market. Through a case study, the paper shows that the proposed methodology is useful in practice and that it provides a decision support system for manufacturing companies.

  • 19.
    Ruiz Zúñiga, Enrique
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Urenda Moris, Matías
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Syberfeldt, Anna
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap. Högskolan i Skövde, Forskningscentrum för Virtuella system.
    Production Logistics Design and Development Support: A Simulation-Based Optimization Case Study (WIP)2016Ingår i: SummerSim'16, 2016 July 24-27, Palais des congres de Montreal (Montreal Convention Center) | Montreal, Quebec, Canada / [ed] Society for Modeling & Simulation International (SCS), The Society for Modeling and Simulation International, 2016, s. 56:1-56:6, artikel-id 56Konferensbidrag (Refereegranskat)
    Abstract [en]

    Manufacturing sectors in Sweden have a long history that leads to common non-optimized flows on the shop floor. Especially when having a really high product mix and a low-volume of customized products, a great deal of effort with respect to flow optimization is needed to stay present and compete in the globalized market. The goal of this project is to support the design and development of the implementation of new production systems and logistics flows considering the shop floor plant layout of a Swedish middle-size water pumps factory. In this paper, with the help of different types of simulation models and optimization, some results of a new technologically adapted production line are analyzed and relevant information and potential improvements in the production are found. The further development of optimization studies using the exiting simulation models is stated as ongoing and future work. The obtained and potential results can serve for decision makers and stakeholders to apply changes and adaptations in the system considering the mid and long term goals of the company.

  • 20.
    Staron, Mirolaw
    et al.
    University of Gothenburg.
    Hansson, JörgenHögskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.Bosch, JanChalmers University of Technology.
    Performance in software development – Special issue editorial2014Samlingsverk (redaktörskap) (Övrigt vetenskapligt)
  • 21.
    Staron, Miroslaw
    et al.
    University of Gothenburg.
    Hansson, Jörgen
    Högskolan i Skövde, Institutionen för informationsteknologi. Högskolan i Skövde, Forskningscentrum för Informationsteknologi.
    Bosch, Jan
    Chalmers University of Technology.
    Performance in software development – Special issue editorial2014Ingår i: Information and Software Technology, ISSN 0950-5849, E-ISSN 1873-6025, Vol. 56, nr 5, s. 463-464s. 463-464Artikel i tidskrift (Refereegranskat)
  • 22.
    Tudero, Aitor
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap.
    Azkue, Julen
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap.
    Emulation of a manufacturing process: Focusing on maintenance and operator training2017Självständigt arbete på grundnivå (kandidatexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Having well-trained operators is a crucial need for Volvo Group Truck Operations (GTO). Mistakes from the factory staff may cause the production line to stop, and lead to economic losses. For this reason, Volvo GTO has decided to investigate the possibility of creating an emulation model from the production line and using it to train operators and maintenance personnel. The aim of this thesis is to develop an Operator Training Station (OTS) for the OP035 of the Volvo GTO Production Line 6. In the first part, a literature research was conducted, from which the authors gained insight into related fields such as emulation, virtual environments, and operator training. After that, an emulation model of theOP035 was created using some hardware from the factory. The real PLC program was analyzed and then modified in order to implement it to the emulation model. Then, communications were established between the different parts; emulation model and PLC program. Finally, a research of the common failures and problems of the production line was carried out, with the aim of being able to reproduce them in the Operator Training Station. Once the OTS was implemented, several tests had undergone to validate its behavior. These experiments verified that the emulation model was an accurate representation of the real system and validated its appropriateness for the operator training application

  • 23.
    Unibaso Eguzkitza, Beñat
    et al.
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap.
    Ismail Dobón, Ismael
    Högskolan i Skövde, Institutionen för ingenjörsvetenskap.
    Development of a flexible test platform utilizing gearbox simulators through programming2016Självständigt arbete på grundnivå (kandidatexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    A gearbox simulator is developed as platform for testing and demonstrating purposes. For that, a rig composed by a mechanical system and electronic equipment for controlling two servomotors is used. The objective of this equipment is to simulate the forces that the gearbox would transmit to the gear lever when the gear change operation is being carried-out. To reach this goal, a program is developed in LabVIEW to command the servomotors, emulating the forces by controlling the output torque and transmitting them to the gear stick as it would be in a real gearbox, taking into account real force-angle curves. Also, a graphical user interface is developed in order to monitor the simulator performance ad ease the way the data is chosen and introduced into the software.As seen in the experiment results, the graphs present similarities in shape and magnitude, which is important in regards of feeling; a better performance could be reach suppressing some system constraints.

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