| 1. |
- Hedenstierna, Philip, et al.
(författare)
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An Integrative Approach To Inventory Control
- 2009
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Ingår i: Rapid Modelling for Increasing Competitiveness. - London : Springer London. - 9781848827479 - 9781848827486 ; , s. 105-118
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Inventory control systems consist of three types of methods: forecasting, safety stock sizing and order timing and sizing. These are all part of the interpretation of a planning environment to generate replenishment orders, and may consequently affect the performance of a system. It is therefore essential to integrate these aspects into a complete inventory control process, to be able to evaluate different methods for certain environments as well as for predicting the overall performance of a system. In this research a framework of an integrated inventory control process has been developed, covering all relations from planning environment to performance measures. Based on this framework a simulation model has been constructed; the objective is to show how integrated inventory control systems perform in comparison to theoretical predictions as well as to show the benefits of using an integrated inventory control process when evaluating the appropriateness of inventory control solutions. Results indicate that only simple applications (for instance without forecasts or seasonality) correspond to theoretical cost and service level calculations, while more complex models (forecasts and changing demand patterns) show the need for tight synchronization between forecasts and reordering methods. As the framework describes all relations that affect performance, it simplifies the construction of simulation models and makes them accurate. Another benefit of the framework is that it may be used to transfer simulation models to real-world applications, or vice versa, without loss of functionality.
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| 2. |
- 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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| 3. |
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| 4. |
- 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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| 5. |
- Hilletofth, Per, et al.
(författare)
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Demand chain management : a Swedish industrial case study
- 2009
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Ingår i: Industrial management & data systems. - : Emerald Group Publishing Limited. - 0263-5577 .- 1758-5783. ; 109:8-9, s. 1179-1196
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Tidskriftsartikel (refereegranskat)abstract
- Purpose - The purpose of this paper is to increase the understanding of demand chain management (DCM) by investigating how it has been structured and executed in an international manufacturing company. Design/methodology/approach - The main emphasis has been on producing descriptive results and the applied research strategy has been an embedded single case study. The case organization originates from Sweden, but it has significant international presence. Empirical data have been collected mainly from in-depth interviews with key persons representing senior management in the case company.Findings - This research shows that DCM is about developing synergies between the demand creation and the demand fulfillment processes. A completely implemented DCM approach should incorporate all the major demand creation and fulfillment processes. This kind of fully implemented approach probably does not exist in real life today but some companies have started to develop versions including some of the major processes, and this research provides an example of this. The ultimate goal of DCM is to gain competitive advantages by differentiating not only the products, but also the delivery process. This is necessary in markets characterized of intensive competition, high product variety, large amount of customer-adapted products, and short product life cycles. It can be concluded that DCM is not another name for demand driven supply chains (SCs) or a fad. It is rather a way to finally benefit from decade long marketing discussions on how to achieve customer focus. It highlights the interplay between marketing and supply chain management (SCM) as an enabler of value creation.Research limitations/implications - This research work is limited to one Swedish company; however the case company has large international presence and is in top three in their industry measured by sales, which provides some ground for the generalization of the research. Practical implications - This paper gives an insight for managers and practitioners to the value of coordinating marketing and SCM to develop a truly customer-driven organization and SC. Originality/value - Several studies have addressed the synergies between marketing and SCM but failed to address how to in some detail realize this in practice. This paper contributes by discussing how to realize this coordination in practice.
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| 6. |
- Hilletofth, Per, et al.
(författare)
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Demand Chain Management : Next Generation of Logistics Management?
- 2007
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Ingår i: Conradi Research Review. - : Industrial Management at University of Vaasa. - 1459-0980. ; 4:2, s. 1-18
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Tidskriftsartikel (refereegranskat)abstract
- In the literature several authors argue that there is a need for a new generation of logistics management since the business environment has changed. This new management philosophy identifies consumers and their requirements as starting point for all supply chain activities and has more properly been termed Demand Chain Management (DCM). The purpose of this paper is to analyze if DCM should be regarded as the next generation of logistics management and furthermore to illustrate its usefulness in practice through case study of Swedish appliance manufacturer. Literature review and case study findings show that DCM is not merely a development of the logistics principles, but rather an integration of marketing and supply chain operations. It is needed in volatile and consumer-oriented environments, which require higher levels of customized products, faster product development and commercialization together with supply, manufacturing and distribution on demand.
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| 7. |
- 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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| 8. |
- 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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| 9. |
- Hilletofth, Per, et al.
(författare)
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ERP Training through Traditional and Intensive Course Formats
- 2009
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Ingår i: Networked Logistics and Production at South-East Finland, St Petersburg and Leningrad Oblast. - : Lappeenranta University of Technology. - 9789522147257 - 9522147257 ; , s. 145-166
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Nowadays Enterprise Resource Planning (ERP) systems have a important role in the performance improvement and control of a company and its entire supply chain. Therefore, this system is a vital part of a company’s competitiveness and new approaches for learning are needed to be developed in order to provide knowledge and skills in faster and more efficient manner for employees. Our aim in this manuscript is it to show, how ERP systems could be incorporated in the logistics courses of a university. This environment provides good platform to test new course formats, since most of the university students do not have any previous experience with these systems.In this research the structure and contents regarding ERP system usage in certain courses in the logistics curriculum at a Swedish University are being presented. Essentially, a traditional approach, where computer sessions are incorporated in ordinary courses are compared to a new intensive and flexible course format entirely dedicated to ERP systems. Additionally, the two utilized approaches are analyzed through student evaluations based on courses arranged during year 2008.Research shows that both of the approaches offer good opportunities; the students appreciated the traditional approach, since it allowed them to receive both theoretical and practical knowledge and skills, while they felt the intensive to be beneficial in developing practical side further. Consequently, the best alternative could be to utilize both of these formats. Still, this research shows that skilled responsible lecturer, among intensive course setting, is quite possibly one route for faster learning and higher productivity oflecturing.
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| 10. |
- Hilletofth, Per
(författare)
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How to develop a differentiated supply chain strategy
- 2009
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Ingår i: Industrial management & data systems. - : Emerald Group Publishing Limited. - 0263-5577 .- 1758-5783. ; 109:1, s. 16-33
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Tidskriftsartikel (refereegranskat)abstract
- Purpose – The purpose of this paper is to contribute to the understanding of supply chain (SC) design and operation by investigating how two case companies have developed and deployed differentiated SC strategies. This study primarily focuses on the operating part of the differentiated SC strategy, that is, how different manufacturing strategies – such as make-to-stock, assembly-to-order, and make-to-order – are used in contemporary manufacturing related SCs. However, this study also includes elements concerning supply and distribution parts.Design/methodology/approach – This study employs a descriptive multiple case study approach. The case organizations originate from Sweden, but they have significant international presence. Empirical data have been collected mainly from in-depth interviews with key persons representing senior and middle management in the case companies.Findings – This research shows how two case companies have developed and deployed a differentiated SC strategy. The case study findings reveal that both the case companies already are employing several manufacturing strategies and also combine these with different distribution strategies. Up to now, the supply part of the differentiated SC strategy has been neglected but probably will be incorporated in the near future. This implies that one efficient way to develop a differentiated SC strategy could be to combine different supply, manufacturing and distribution strategies into various SC solutions. By combining relatively few strategies, it is possible to develop several differentiated SC solutions.Research limitations/implications – The research work is limited to Swedish companies, however, the case companies are in top three in their respective industries measured by sales, which provides ground for the generalization of the research.Practical implications – This paper gives an insight to managers and practitioners in how to develop and deploy a differentiated SC strategy.Originality/value – Several studies have discussed the appropriate SC strategy issue but failed to address the need to utilize several SC solutions concurrently. However, this paper contributes by discussing how to develop and deploy a differentiated SC strategy and how to manage these multiple SCs.
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