Papers by joacim johnsson
Proceedings of the 2003 International Conference on Machine Learning and Cybernetics (IEEE Cat. No.03EX693)
Discrete Event Simulation (DES) is ranked among the top three tools for management support. Howev... more Discrete Event Simulation (DES) is ranked among the top three tools for management support. However, it lags in becoming the successful tool in the industry that many experts have predicted. In this paper, sixteen projects accomplished in the area of DES have been analyzed in order to find the reasons for this delay. Most important is the lack of reliable manufacturing data in companies. This is due to inadequate practices within the organization, thus forcing users to build simulation models with estimated data. The paper also answers other questions as to why DES is an underutilized decision tool. DES is an information-intensive tool for decision-making, but has weak support concerning working procedures within organizations. Continuous generation of manufacturing data at all levels has to be supported by the working procedure in order to increase the use of DES as an everyday tool. How to improve this situation also is discussed.
Today, making decisions in a distributed production system, like a Virtual Enterprise [VE], have ... more Today, making decisions in a distributed production system, like a Virtual Enterprise [VE], have few support tools. This paper discusses how Discrete Event Simulation [DES] can be used in a VE environment. A DES model was built involving multiple developers who were individually responsible for one part of the model. In this case study, incremental development methodology has been used together with a methodology for conducting DES projects. The paper presents reflections from the developers and gives recommendations for applying DES on a VE. The most important reflections were to formulate a well defined goal for the project as a whole, to start with integration as early as possible, and to have tangible goals. can be achieved by using overcapacity within the collaborating companies. Therefore no, or very small, investments have to be made. A manufacturer that has all operations in-house has better control over the complete production system. But is not as good as a VE to manage the flexibility in volume and mix that comes with handling many different orders.
Managing Strategic, Tactical and Operational Performance in Manufacturing Collaboration
Global competitiveness sets the stage with high pressure on productivity and performance in all a... more Global competitiveness sets the stage with high pressure on productivity and performance in all aspects of a companies business and its supporting environment. One way to generate an advantageous competitive solution is to use collaboration networks of multiple companies with core competence in specific areas. These kinds of networks can be seen in Sweden (Gnosjö, Skaraborg) and in other places in the world, such as Silicon Valley and northern Italy. Efficient collaboration has by many been classified as an important issue for staying competitive in the future of manufacturing (Visionary Manufacturing Challenges for 2020, Technology Foresight Panel 4). The purpose of this paper is to outline how collaborating companies handle performance between partners in different levels, e.g strategic-, tactical- and operational- level. The paper is initiated with a literature overview of methods to secure overall collaboration and performance. The methods will then be analyzed and combined in a discussion finalized with a conclusion.
Ce document est protégé par la loi sur le droit d'auteur. L'utilisation des services d'Érudit (y ... more Ce document est protégé par la loi sur le droit d'auteur. L'utilisation des services d'Érudit (y compris la reproduction) est assujettie à sa politique d'utilisation que vous pouvez consulter en ligne.
In der Publikationsreihe RatSWD Research Notes erscheinen empirische Forschungsergebnisse, beruhe... more In der Publikationsreihe RatSWD Research Notes erscheinen empirische Forschungsergebnisse, beruhend auf Daten, die über die durch den RatSWD empfohlene informationelle Infrastruktur zugänglich sind. Die Pre-Print-Reihe startete Ende 2007 unter dem Titel RatSWD Working Papers. Arbeiten aus allen sozialwissenschaftlichen und wirtschaftswissenschaftlichen Disziplinen können in der Reihe erscheinen. Die Reihe RatSWD Research Notes bietet einen Einblick in die vielfältigen wissenschaftlichen Anwendungsmöglichkeiten empirischer Daten und Statistiken und richten sich somit an interessierte, empirisch arbeitende Wissenschaftler/innen ebenso wie an Vertreter/innen öffentlicher Einrichtungen der Datenerhebung und der Forschungsinfrastruktur. Die RatSWD Research Notes sind eine Plattform für eine frühzeitige zentrale und weltweit sichtbare Veröffentlichung von auf empirischen Daten basierenden Forschungsergebnissen und konzeptionellen Ideen zur Gestaltung von Erhebungen. RatSWD Research Notes sind nicht-exklusiv, d. h. einer Veröffentlichung an anderen Orten steht nichts im Wege. Alle Arbeiten können und sollen auch in fachlich, institutionell und örtlich spezialisierten Reihen erscheinen. RatSWD Research Notes können nicht über den Buchhandel, sondern nur online über den RatSWD bezogen werden. Um nicht deutsch sprechenden Leser/innen die Arbeit mit der neuen Reihe zu erleichtern, sind auf den englischen Internetseiten der RatSWD Research Notes nur die englischsprachigen Papers zu finden, auf den deutschen Seiten werden alle Nummern der Reihe chronologisch geordnet aufgelistet. Die Inhalte der Ausgaben stellen ausdrücklich die Meinung der jeweiligen Autor/innen dar und nicht die des RatSWD.
Uploads
Papers by joacim johnsson