| 1. |
- Finnsgård, Christian, 1974
(författare)
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Assembly processes and materials supply systems design
- 2009
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Lean production has over the last decades emerged as the most important paradigm for production, with the assembly processes in focus, including the objective to minimize non-value-adding work. Thus, much attention has been on the work of the assembly operator. However, little focus has been devoted to how the new requirements from lean production have been transformed into materials supply systems supporting the assembly processes. Hence, the purpose of this thesis is to contribute to increased knowledge about the relation between assembly processes and materials supply systems design.A framework is introduced in this thesis, describing how requirements from the assembly processes are transformed by the materials supply system into the actual materials flow. In the results of this thesis, a model structuring requirements in materials supply and assembly processes is proposed, tested, and subsequently different requirements were identified. Materials exposure is introduced as the transition from the materials supply system to the assembly system. Results show that that the materials exposure has a large impact on assembly workstations performance in terms of space needed, non-value-adding work and ergonomics. Further, an experiment showed that the materials exposure factors with the largest impact on picking time were packaging, angle of packaging and height above floor.Major contributions in this thesis are the identification and structuring of requirements in assembly processes and materials supply systems, and explaining how the materials exposure affects the assembly processes. How this knowledge can be applied in the design of new, or redesign of existing, production systems and materials supply processes in particular, is a managerial contribution.
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| 2. |
- Finnsgård, Christian, 1974, et al.
(författare)
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Impact of materials exposure on assembly workstation performance
- 2011
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Ingår i: International Journal of Production Research. - : Informa UK Limited. - 0020-7543 .- 1366-588X. ; 49:24, s. 7253-7274
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Tidskriftsartikel (refereegranskat)abstract
- This paper examines how the choice of materials exposure impacts workstation performance, in terms of non-value-adding work, space requirements and ergonomics. In a typical Swedish automotive setting, components are exposed in wooden pallets with frames beside the assembly line and supplied by forklift truck. In a case study, three workstations on an assembly line were studied and redesigned following the principles of lean production, using smaller plastic containers for the materials exposure. After the redesign, the space required for materials was reduced by 67%, non-value-adding work decreased by 20%, and walking distance was reduced by 52%. Furthermore, the ergonomics for the assembly operator improved greatly, with a 92% reduction of potentially harmful picking activities, thereby almost eliminating potentially harmful body movements. The theoretical contribution of this paper is firstly the development of an analysis model describing the impact of material exposure on workstation performance and secondly development of the existing categorization of work operations to include different materials handling activities. The most important managerial implication is an increased understanding of the relationship between space, ergonomics, non-value-adding work and materials exposure. These findings have direct implications on workstation design in industry.
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| 3. |
- Finnsgård, Christian, 1974
(författare)
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Materials exposure: The interface between materials supply and assembly
- 2013
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis concerns the supply of components to assembly in production sys- tems, and introduces materials exposure as the interface between materials sup- ply systems and assembly systems. The purpose of the thesis is to explain how materials exposure influences the performance of materials supply systems and assembly systems. The supply of components is crucial for assembly, for in serving the requirements from assembly. Still, the materials supply system has to remain efficient. In this way, materials exposure impacts the performance of a production system as a whole.The thesis is a based on five studies, all of which depart from theoretical frame- works developed from literature and empirically applied within the Swedish automotive industry. Four case studies and one experiment were conducted to answer three research questions, and the results are published in five papers.The results of the thesis provide several theoretical and practical contributions. Both the position of the exposure and the size of the packaging for a component impact the performance of the assembly workstation performance in terms of space required, non-value-adding work, and ergonomics. Materials exposure impacts manual picking time at assembly lines, for which packaging is the most influential factor, followed by angle of exposure and height of the exposed com- ponent. Materials exposure further impacts the configuration of the in-plant ma- terials supply system by requiring additional activities in the in-plant materials supply system, which impacts its performance. Concerning the impact of choice of packaging used in materials exposure, a model to evaluate the impact a pack- aging has on the performance of the materials supply system was developed. The Materials Flow Mapping methodology is another contribution that describes the activities in materials supply systems, as well as categorises the activities in material flows into materials handling, transportation, storage, and administra- tive activities.This thesis explains how the materials exposure influences the performance of materials supply systems and assembly systems. It shows how materials expo- sure impacts the assembly system performance and the in-plant materials supply system performance, and finally, how the packaging for materials exposure im- pacts the performance of the materials supply systems and assembly systems. The thesis can further be used as a guide for how materials should be exposed and in the selection of packaging for materials exposure. The most beneficial managerial use would be in the design and operation of assembly systems, mate- rials supply systems, and in particular, materials exposure.
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| 4. |
- Finnsgård, Christian, 1974, et al.
(författare)
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Swedish shippers’ strategies for coping with slow-steaming in deep sea container shipping
- 2018
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Ingår i: Journal of Shipping and Trade. - : Springer Singapore. - 2364-4575. ; 3:8
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Tidskriftsartikel (refereegranskat)abstract
- When container shipping lines experience over-capacity and high fuel costs, they typically respond by decreasing sailing speeds and, consequently, increasing transport time. Most of the literature on this phenomenon, often referred to as slow-steaming, takes the perspective of the shipping lines addressing technical, operational and financial effects, or a society perspective focusing on lower emissions and energy use. Few studies investigate the effects on the demand side of the market for container liner shipping. Hence, the aim of this study is to elaborate on the logistics consequences of slow-steaming, particularly the strategies that Swedish shippers purchasing deep sea container transport services employ to mitigate the effects of slow-steaming. Workshops and semi-structured interviews revealed that shippers felt they had little or no impact on sailing schedules and were more or less subject to container shipping lines’ decisions. The effects of slow-steaming were obviously most severe for firms with complex supply chains, where intermediate products are sent back and forth between production stages on different continents. The shippers developed a set of strategies to cope with the low punctuality of containerised shipping, and these were categorised in the domains of transfer-the-problem, transport, sourcing and distribution, logistics and manufacturing, and product design. All firms applied changes in the transport domain, although the lack of service segmentation limited the effects of the strategy. Most measures were applied by two firms, whereas only one firm changed the product design.
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| 5. |
- Hanson, Robin, 1981, et al.
(författare)
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Impact of unit load size on in-plant materials supply efficiency
- 2014
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Ingår i: International Journal of Production Economics. - : Elsevier BV. - 0925-5273 .- 1873-7579. ; 147:PART A, s. 46-52
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Tidskriftsartikel (refereegranskat)abstract
- The unit loads, e.g.; plastic containers or EUR-pallets, used in an assembly plant can have a significant impact on time efficiency, and hence cost, of both the materials supply and the receiving assembly stations. Smaller unit loads can reduce the time the assemblers spend fetching parts. However, larger unit loads result in fewer moves for a given volume of materials, which implies efficient in-plant materials supply. The current paper explores how the time efficiency of in-plant materials supply is affected by the size of unit loads. Based on the case study, it is clear that the efficiency of the in-plant materials supply is not proportional to the size of the unit loads. There are fundamental differences between how large pallets, compared to smaller unit loads, are delivered, meaning that the increased delivery frequency required for smaller unit loads does not necessarily result in an increased man-hour consumption.
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| 6. |
- Landström, Anna, 1990, et al.
(författare)
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A life cycle approach to business performance measurement systems
- 2018
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Ingår i: Procedia Manufacturing. - : Elsevier BV. - 2351-9789. ; 25, s. 126-133, s. 126-133
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Konferensbidrag (refereegranskat)abstract
- Virtually every company has implemented a Business Performance Measurement System (BPMS) with the purpose of monitoring production and business performance and to execute the corporate strategy at all levels in a company. The purpose of this article is to shed light on common pitfalls related to the practical use of BPMS and further to present a life cycle model with the purpose of introducing structured approach to avoiding the pitfalls. The article contributes to further development of the BPMS life cycle concept and practical examples of how it can be used.
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| 7. |
- Liljestrand, Kristina, 1985, et al.
(författare)
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Providing explicit descriptions of studied systems: more than a necessary evil?
- 2015
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Ingår i: Nofoma Conference Proceedings. - 9788279622024
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Konferensbidrag (refereegranskat)abstract
- PurposeExplicit descriptions of studied systems can support researchers in clarifying objects of study and motives of research as well as in structuring research design. However, since many scholars of systems approaches operate outside the field of logistics, applying systems approaches in logistics can be challenging. The purpose of this paper is therefore to describe how a systems approach can be applied in logistics so as to provide guidance for logistics researchers in their descriptions of studied systems.Design/methodology/approachTwo systems approaches were used to describe the systems studied in six doctoral theses. A series of workshops was conducted to compare the descriptions and share challenges.FindingsKey aspects for adapting the selected systems approaches corresponded to four areas of logistics—activities, flow, performance, and actors—all of which can be included in the selected systems approaches. Advice for doctoral students on applying these frameworks is provided.Research limitations/implicationsThis research can provide support to other logistics researchers when applying systems approaches and developing explicit descriptions of studied systems.Original/valueSystems approaches are central to logistics research, a field in which scholars are encouraged to apply well-known systems approaches. This paper contributes value by providing explicit examples of how such approaches were applied in six logistics research projects.
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| 8. |
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| 9. |
- Pålsson, Henrik, et al.
(författare)
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Selection of packaging systems in supply chains from a sustainability perspective – the case of Volvo
- 2013
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Ingår i: Packaging Technology & Science. - : Wiley. - 0894-3214 .- 1099-1522. ; 26:5, s. 289-310
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Tidskriftsartikel (refereegranskat)abstract
- The purpose of this article is to develop an evaluation model for the selection of packaging systems in supply chains from a sustainability perspective. A theoretical evaluation model for comparing cost efficiency and the environmental impact of packaging systems in supply chains are developed from literature. The model is tested in a case study of a supply chain involving Volvo Car Corporation and Volvo Logistics Corporation, comparing the use of newly developed, one-way packaging with the sustainability of returnable packaging. The model compares the environmental and economic impacts of two packaging systems in a specific supply chain. The criteria used in the model are (i) packaging fill rate, (ii) packaging material, (iii) transport, (iv) material handling, (v) waste handling and (vi) administration. In the case study, the one-way packaging resulted in fewer economic and environmental impacts, thereby indicating the importance for companies to question their packaging systems. The model has been tested on one component in a case study. It provides a comparison of the packaging choices included using comparative, but not absolute, figures for the economic and environmental impacts. Managers can use the model to compare packaging systems for component supply and determine the most sustainable packaging from environmental and economic perspectives. The case study indicated that the returnable packaging system commonly used in the automotive industry is not always preferable in terms of sustainability. The article fulfils the need to evaluate the impact of packaging systems on supply chain sustainability in terms of economic and environmental criteria. Copyright © 2012 John Wiley & Sons, Ltd.
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| 10. |
- Forsman, Fredrik, 1973, et al.
(författare)
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Teamwork as joint activity in sailing
- 2016
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Konferensbidrag (refereegranskat)abstract
- Sailing is a sport and activity that takes a long time both to learn and to master, as much of its competence-based knowledge is acquired through experience. Experiencebased learning is very important, time-intensive, and the factors for success are often tacit and hidden. Should these success factors become explicit and salient, learning would occur faster and produce obvious competitive advantages. This research was conducted by embedding on-going research results into two competitive sailing teams racing in different classes, one offshore keelboat racing with a crew of eight, and a one-design Star-class racing yacht with a crew of two. The data collection consisted of observations, interviews, and video recordings. The results were also verified with the crews to catch biases in the analysis process. A jibe, a specific but common maneuver was analyzed from the perspective of Common Ground within Joint Activity. Maneuvering a competitive offshore sail racer or a previously Olympic Star-class yacht are tasks that fulfill the requirements for Joint Activity. A high level of Common Ground is required for the effective coordination needed in order to perform at a high level and maintain the safety of the crew and equipment. Breakdowns in the coordination of maneuvers were observed, although they must be recorded on video for higher analysis reliability. To achieve greater validity, more and different maneuvers should be considered within the analysis. By better understanding the factors for success, sail racing teams can more quickly gain competence and thus competitive advantages. The research analyzes the teamwork found in sailing from the perspective of Joint Activity and Common Ground and provides insight into how to achieve performance improvements more efficiently.
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