| 1. |
- Hedenstierna, Philip, et al.
(författare)
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Design of a Framework for Inventory Control - Evaluation of Forecasting and Inventory Control Systems
- 2009
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Ingår i: Flexible Automation and Intelligent Manufacturing 2009 (FAIM 2009). - Middlesbrough, UK : Curran Associates, Inc.. - 9780956230331 - 9781615676279 ; , s. 573-580
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Konferensbidrag (refereegranskat)abstract
- Managing inventories so that overall costs are kept low, while service levels are maintained is the central issue of inventory control, which only regulates two things: the size and the timing of orders. This is typically executed through a planning method, such as the reorder point system or, less frequently, the periodic order quantity system. These take into account a forecast, supposed to gauge the average future demand, and a predetermined safety stock, buffering against forecast errors and demand uncertainty. Pure demand also influences the system, as transactions affect the inventory level. It is crucial to understand how a complete system of demand, forecasts, safety stock calculations and planning methods work together to measure service level and overall cost of the system. This paper outlines a framework for the unambiguous representation of the relations between methods that interpret environmental parameters to plan orders. A number of simulations based on the framework are run to show, how the integration of the inventory control functions may affect the overall performance of the system. The usefullness of the framework lies in its ability to make a system duplicable (i.e. to transfer an inventory control system to a simulation model, or vice versa). Not only is this property important for creating simulation models that exactly depict the system being analysed, it also enables the study of a complete system for order planning, as opposed to optimising individual methods. Studying an inclusive system allow the same metrics to be used to evaluate changes to any method in the system. Another benefit of this approach is that the system's metrics directly reflect changes in the environment. Simulations based on this framework are precise and substantially easier to evaluate than models not adhering to any standard.
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| 2. |
- Hilletofth, Per, et al.
(författare)
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Agent Based Decision Support in Manufacturing Supply Chain
- 2009
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Ingår i: Agent and Multi-Agent Systems: Technologies and Applications. - Berlin, Heidelberg : Springer Berlin/Heidelberg. - 3642016642 - 9783642016646 - 9783642016653 ; , s. 677-686
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Supply Chain Management (SCM) is becoming increasingly complex and an intensified competition in the end-markets has started to create a situation where co-operation requirements between companies in a Supply Chain (SC) are increasing. The old mechanistic operations management solutions are becoming obsolete and advanced decision support is increasingly needed to realize efficient and effective management of complex SCs. The objective of this research is to contribute to the understanding of how Agent Based Modeling (ABM) can advance decision making and to discuss why ABM should be regarded as method to realize Information Fusion (IF). In this research work an agent based model of SCM has been implemented in a simulation platform to provide an approach for evaluation of decision and management alternatives. Research shows that this kind of decision support system is based on IF, since it collects and fuses information from different sources into a situation image that provides effective support for human decision making
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| 3. |
- Hilletofth, Per, et al.
(författare)
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Agent-based simulation fusion for improved decision making for service operations
- 2009
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Ingår i: Proceedings of the 12th International Conference on Information Fusion. - Seattle, US. - 9780982443804 ; , s. 998-1005
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Konferensbidrag (refereegranskat)abstract
- We use agent-based modeling and simulation to fuse data from multiple sources to estimate the state of some system properties. This implies that the real system of interest is modeled and simulated using agent principles. Using Monte-Carlo simulation, we estimate the values of some decision-relevant numerical properties. We use the estimated properties, such as utilization of resources and service levels, as a decision support for a Maintenance Service Provider. Our initial results indicate that this kind of fusion of information sources can improve the understanding of the problem domain (e.g. to what degree some critical properties influence service operations) and also generate a basis for decision-making.
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| 4. |
- Hilletofth, Per
(författare)
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Differentiated Supply Chain Strategy - Building Knowledge through Case Studies
- 2008
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Ingår i: Fourth International Railway Logistics Seminar. - Kouvola, Finland : Lappeenranta University of Technology. - 9789522146014 ; , s. 5-28, s. 5-28, s. 5-28
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Nowadays companies usually offer a wide range of products and services in various types of non-coherent business environments. It is becoming apparent that traditional ‘one-size-fits-all’ supply chain strategies does not support a wide range of products sold in a diversity of markets. Consequently, it becomes increasingly necessary to employ different manufacturing and delivery strategies concurrently in order to develop a differentiated supply chain strategy. This paper employs a descriptive multiple case study approach to illustrate how two companies has develop a differentiated supply chain strategy. Case study findings reveal that one efficient method to develop a differentiated supply chain strategy is to combine different manufacturing and delivery strategies into various supply chain solutions. By combining relatively few strategies it is possible to develop several differentiated supply chain solutions.
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| 5. |
- Hilletofth, Per
(författare)
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Enterprise resource planning systems in higher education
- 2008
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Ingår i: Proceedings of the 4th Railway logistics Seminar. - Kouvola, Finland : Lappeenranta University of Technology. ; , s. 167-180, s. 167-180, s. 167-180
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Konferensbidrag (refereegranskat)abstract
- Information systems and technology are becoming more and more important in the industry. Consequently, it is important to include these in any modern logistics education. This paper describes how ERP-systems are utilized in logistics education programs and courses at University of Skövde (Sweden). The objective of this paper is to highlight the importance of information systems and technology in a modern logistics education.
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| 6. |
- Hilletofth, Per, et al.
(författare)
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Information fusion in maintenance planning
- 2007
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Ingår i: Proceedings of Swedish Production Symposium. - Göteborg, Sweden.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Industrial production service organisations, companies maintainingproduction machines and whole processes as well as factories, are in great demand ofproductivity and profitavility improvement. Usually performance in theseorganisations arises from high utilization of personnel, superior engineeringknowledge and purchasing expertise/power. However, small and medium sizedmaintenance service providers mostly differate themselves with two first mentioneditems. In this paper we will propose information fusion cockpit to be used in theSME maintenance organisation to enhance problem solving, demand visibility andresource need estimates – hopefully this will enhance the performance of a caseorganisation. As a key input variable to manage large amount of different customerswe identify incoming calls to trigger information collection from vast number ofdifferent databases – the integration of this incoming “demand” is the first step to betaken in the use of more advanced systems. We also speculate in this paper, howagent based artificial intelligence could be used in order to take full benefit frommore advanced system.
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| 7. |
- Hilletofth, Per, et al.
(författare)
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Integration and formalization of strategic product development and commercialization in a manufacturing company : A challenge for supply chain management
- 2008
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Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing. - Skövde : University of Skövde. - 9789163327575 ; , s. 532-539
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Konferensbidrag (refereegranskat)abstract
- The last decades a new type of business environments has evolved characterized by rapid and volatile demand changes, short product life cycles, and high levels of customized products. The competitiveness of a business in these environments is mostly determined by its responsiveness. This is characterized by the ability to quickly scale up or down the production volume, the presence of an innovative and fast product development, and a quick incorporation of consumer requirements into the product development. This paper employs a descriptive case study approach to illustrate how product development and commercialization can be integrated into a product management flow to realize innovative and faster product development. Case study findings reveal that the case company has during a five year period increased the number of successful product introductions. Furthermore, the studied approach proves to be successful in this mature business environment where it is essential to develop products based on the consumer need and behaviour and to differentiate the product assortment. Based on our case study we also recognize that the product management flow does not concern supply chain management (SCM) to some extent in the case company – this indicates that further development is needed in SCM applications to support product life-cycle based managerial processes.
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| 8. |
- Hilletofth, Per, et al.
(författare)
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New Product Development in a Manufacturing Company - A Challenge for Supply Chain Management
- 2009
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Ingår i: Proceedings of the 19th International Conference on Flexible Automation and Intelligent Manufacturing. - : Teesside University. - 9780956230331 ; , s. 1169-1177
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Konferensbidrag (refereegranskat)abstract
- The last decades a new type of business environments has evolved characterized by rapid and volatile demand changes, short product life cycles, and high levels of customized products. The competitiveness of a business in these environments is mostly determined by its responsiveness. This is characterized by the ability to quickly scale up or down the production volume, the presence of an innovative and fast product development, and the quick incorporation of customer requirements into the product development. This paper employs a descriptive single case study approach to illustrate how product development is structured and executed in an international manufacturing company, seeking to realize an innovative, predictable, and efficient product development. The objective is to increase the understanding of how product development and product life-cycles are connected to Supply Chain Management (SCM). Case study findings reveal that the case company after implementing a strategic and structured Product Creation Process (PCP) has improved the efficiency and effectiveness of product development. Findings also reveal that the case company has not yet developed any linkages between product development and SCM. Still, the case company has become aware of this issue due to problems associated with the lack of integration between product development and SCM.
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| 9. |
- Into, Camilla, et al.
(författare)
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Transitlager som en strategi i ett globalt distributionssystem
- 2009
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Ingår i: PLANs forsknings- och tillämpningskonferens 2009. - Stockholm : PLAN Logistikföreningen. - 9197644439 - 9789197644433 ; , s. 93-103
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Konferensbidrag (refereegranskat)abstract
- Distributionen har kommit att bli en nyckelfaktor i dagens logistiksystem i och med att företag önskar uppnå skalfördelar i sin produktion genom fokuserade fabriker samtidigt som dagens kunder kräver alltmer kundanpassade produkter och leveranser till kortare ledtider. Syftet med denna studie är att undersöka om transitlagerstrategin, som ett komplement till den centraliserade och den decentraliserade distributionsstrategin, kan erbjuda företag konkurrensfördelar. Studien visar att transitlagerstrategin kan ge stora konkurrensfördelar genom att den erbjuder relativt korta leveranstider utan att produkterna behöver lagerhållas lokalt, vilket ger lägre lagerhållningskostnader och en lägre kapitalbindning. För att lyckas med strategin krävs en god planering, kundsamarbete, marknadskännedom och ett informationssystem som klarar av att stödja strategin.
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| 10. |
- Jäger, Kerstin, et al.
(författare)
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Logistics actors : Key issues for a service developer
- 2008
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Ingår i: Proceedings of the 18th International Conference on Flexible Automation and Intelligent Manufacturing. - Skövde, Sweden. ; , s. 1329-1336
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Konferensbidrag (refereegranskat)abstract
- The very hard competition between companies have resulted in an increased outsourcing of many activities thatare not considered to be core activities, or main business processes. This has created an emerging businessopportunity attracting many new actors, companies, to enter the market and fill the demand for new services.Logistics is one example of activities not seen as core competence in many companies; in this paper we use adescriptive case study approach to illustrate the requirements to succeed as such a logistics service provider.Primarily this requires a close relationship between the actors and trust and openness are important factors tomaintain. The kind of relationship, the exchange of information, the nurturing of trust and the service ofinformation systems has to be solved. The case-study is based on a company, LBC, which acts as a logisticsservice developer, and the focus is on the services provided and the company’s view of the customer relationship.Findings reveal that logistics service developer to a large extent needs to focus on the customer and continuouslydevelop their service range to offer improved/new services. We have found that LBC has gone from a traditional3PL to become a service developer and provide customized services according to every single customers need.The most important is to have a starting point from the view of the customer. LBC solve this, among other things,with a personal contact to every customer. According to the literature one could segment different logisticsactors into four categories.
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