| 1. |
- Andersson, Roy
(författare)
-
Supply chain resilience through quality management
- 2009
-
Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The length and complexity of the supply chain tend to increase, rather than diminish, thereby making the supply chain riskier and less predictable and, hence, more vulnerable. At the same time, customers are becoming increasingly demanding. The challenge to businesses today is to create a resilient supply chain in order to manage and mitigate risk and vulnerability.The purpose of the thesis is to explore, describe and develop the use of a combined quality management philosophy in logistics processes in order to improve supply chain resilience. The findings are supported by six studies, which are presented here in six papers.The studies show that there is a lot to gain if organisations are able to combine quality management philosophies, as they are complementary to one another. TQM places its strongest emphasis on the commitment and involvement of all employees. Lean is a discipline that focuses on process speed and removal of waste in order to increase customer value. Six Sigma benefits from an added focus on variability and design of products/services and processes. It has been indicated that a combined quality management philosophy makes the logistics processes more reliable, flexible, agile and robust while reducing cost. The companies’ risk awareness has increased and their risk management has been improved, thanks to the Six Sigma training programmes and philosophy. Using a combined quality management philosophy, the speed of production could be increased, and the responsiveness and flexibility could be improved, which means quicker response to changes. It has also been indicated that a combined quality management philosophy improves the companies’ resilience, due to their increased agility and strengthened ability to handle variability and risk management. Quality management tools can be very effective in the companies’ efforts to control supply chain risk and to identify risk sources of variation, even outside the focal company. In Six Sigma projects, the root cause of variation is often found outside the focal companies, which requires more collaboration in the supply chain. However, if the companies that use a combined quality management philosophy intend to become more resilient, they must involve suppliers and customers more in their own processes and design products/services and processes together.Collaboration with the suppliers and customers and the notion of how to extend a combined quality management philosophy outside the focal company are of importance in order to make the whole supply chain resilient. This could lead to a problem, especially since the conditions for transport and logistics in regards to the application of quality methods and tools represent a large area, unexploited by the companies. On the other hand, Six Sigma has standardised training courses, and it has been demonstrated how a Six Sigma framework can enable collaboration across companies’ boundaries in the supply chain, with the use of Six Sigma training and the DMAIC-roadmap as a common platform. Even if a combined quality management philosophy is effective and efficient, the companies must re-invest in additional methods, tools and strategies to make the entire supply chain resilient. It could be this re-investment in risk prevention and mitigation solutions that enables faster process responsiveness, the establishment of a risk management culture by creating common values, culture and rules in the supply chain and the use of logistics strategies and methods.
|
|
| 2. |
- Edh Mirzaei, Nina, et al.
(författare)
-
Challenges to competitive manufacturing in high-cost environments: checklist and insights from Swedish manufacturing firms
- 2021
-
Ingår i: Operations Management Research. - : Springer Nature. - 1936-9735 .- 1936-9743.
-
Tidskriftsartikel (refereegranskat)abstract
- Research on competitive manufacturing (CM) in high-cost environments has earlier indicated that firms struggle to remain competitive and that manufacturing operations often have been offshored to low-cost environments. The purpose of this research is to explore and create a compounded view of challenges related to both internal and external environments of firms when operating in high-cost environments. This issue has been investigated through a qualitative case study involving five manufacturing firms in Sweden. This research has empirically derived the challenges associated with sustaining CM in high-cost environments and developed a prescriptive checklist. Seven main categories of challenges have been identified, ranging from a micro level related to product characteristics and employee involvement, to a macro level related to supply chain collaborations and industry systems. This research contributes to the existing literature on CM in high-cost locations by explaining and detailing what constitutes challenges in this kind of environment.
|
|
| 3. |
- Eriksson, David, 1982
(författare)
-
The Impacts and Requirements of Consumer-Focused New Product Development on Supply Chain Management
- 2011
-
Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The purpose of this thesis is to explore the impacts and requirements of a consumer-focusednew product development on supply chain management. The issue is examined in a large indepthcase study of the Swedish furniture industry, with one wholesaler as the main casecompany. The case company has changed its business strategy from being product-focused toconsumer-focused. The company has started to develop innovative products that are suppliedwith a postponement strategy. The thesis focuses on how new product development andsupply chain management are connected at the case company, and how the new businessstrategy affects sourcing, manufacturing, inventory, and distribution.Investigations reveal that the consumer-focused new product development resulted in animbalance between demand creation and supply chain management. New productdevelopment is the key process connecting the two management directions. The new businessstrategy increased the amount of stock keeping units, which in combination with the declinein economy in 2008 resulted in a bad alignment between the business strategy and thesourcing system. This, in turn, resulted in inefficient inventory management. The newproducts that were developed have high innovative value, but the value may be lost if theretailers are not able to present the value to the consumers. The distortion of information thatreduces the value is illustrated with a value gaps model that also explains the importance ofdemand creation across the supply chain, in order to fully utilize the potential of the supplychain and new product development. Moreover, a model explaining the outcome of lowversus high collaboration with retailers, and obvious versus obscure product value, wasconstructed, highlighting that consumer perceived value may be lost if the value is obscureand collaboration is low.The impact of the investigated new product development approach on supply chainmanagement is that the supply chain might lose efficiency and effectiveness if the supplychain capabilities to support the new products are not considered. The main requirement is toacknowledge that the partners in the supply chain play an important role, in order to preservethe innovative value of the products and increase demand creation.
|
|
| 4. |
- Hemlin, Sven, 1948, et al.
(författare)
-
Organizational support for innovation in biosciences: Comparing high and low performers in Sweden and Croatia
- 2009
-
Ingår i: European Sociological Association, ESA 9th conference, 2-5 September, 2009, Lisbon.
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- There is a need to better understand the organizational factors influencing innovative performance. This cross-cultural study examined organizational support factors in biotech R&D groups differing in innovative performance. The objective was to twofold; first to explore how organizing influences innovativeness in R&D, and, second to examine if R&D organizing is related to nations having a low and high innovation degree, respectively. Results supported that organizing R&D as well as national innovation performance are related. Crucial organizational issues found were how much organizations encouraged innovations, the degree of perceived autonomy and to what extent organizations could supply knowledge. Some of the implications of these results are introduced.
|
|
| 5. |
- Asbjörnsson, Gauti, 1985, et al.
(författare)
-
Modelling of Discrete Downtime in Continuous Crushing Operation
- 2015
-
Ingår i: Computational Modelling 2015, MEI conference.
-
Konferensbidrag (refereegranskat)abstract
- Crushing is a harsh process and production units are subjected to wear and failure over time which will reduce the overall performance of the plant. To achieve optimum process performance, both time dependant process dynamics and operating conditions should be taken into account.In this paper the aim is to create a framework for simulating the process from a more operational perspective to evaluate process performance and process optimum for different operational scenarios. The objective is to model and simulate the discrete phenomena that can cause the process to alter performance and implement it with dynamic process simulations. A method for combining discrete probability simulations with time-continuous simulations for process evaluation and optimization is presented. The proposed framework demonstrates a systematic approach to evaluate the process performance and locating optimum process configuration, for a given condition. The developed models can be used to optimize different aspects of the operation depending on the defined objective function and the system boundaries. Optimization of process throughput by manipulating configuration of both the grizzly and the crushers, as well as the time between calibrations has been illustrated in this paper. Adjusting the process continuously and calibrating it at the appropriate time can have major benefits when it comes to the process availability and utilization, increasing performance by 4.1-9.3 % in these cases. Evaluation of process robustness with regards to different maintenance strategies and process variation gave an indication of the process and unit performance under a long operating period. By combining discrete and dynamic simulation, a higher simulation fidelity can be achieved to provide a more operational perspective to the optimization and process analysis.
|
|
| 6. |
- Bengtsson, Magnus, 1973, et al.
(författare)
-
ADVANCED MATERIAL MODELLING IN CRUSHING PLANTS USING REAL TIME ALGORITHMS
- 2015
-
Ingår i: Computational Modelling 2015, MEI conference.
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- In process control of crushing plants the traditional control is focused on stability control ofsingle machines and not on controlling material utilization. The reason for this is that the use ofmaterial property models is not that well known. The material models describe properties as e.g.capacity over time for a given product and this may depend on many parameters and dynamic effectsin the process. Due to this it is complicated to model and thus a methodology is needed to solve thisproblem. In this paper a novel method for modeling the current effect that the production units haveon the material presented. The paper presents a methodology how to use process data from SCADAsystem to analyze and suggest dynamic material model properties in real time.
|
|
| 7. |
- Bengtsson, Magnus, 1973, et al.
(författare)
-
Cost And Performance Optimization Of A Tertiary Crushing Stage
- 2015
-
Ingår i: ESCC 2015 Conference. - Göteborg : Chalmers University of Technology. - 9789188041012
-
Konferensbidrag (refereegranskat)abstract
- There is increasing demand to optimise performance and profit of crushing plants. Research in this area has resulted in the development of numerous optimisation tools, and resent research has shown that the quality aspects of production have great influence on the optimisation results. The quality, cost, profit and capacity of a product is influenced by several parameters, and in order to control all of these parameters it is necessary to use some sort of optimisation software. In this paper, a novel approach use the parameters cost, profit, capacity and quality in order to perform a multi objective optimization of a crushing plant is presented. As an example a tertiary crushing stage consistent of a cone crusher and a vertical shaft impact crusher (VSI) is used as base for the designed objective function. The process has a given set of constraints that represents the conditions normal in these type of crushing applications. The first step in this paper is to identify if the range of the constraints can cause undesirable production costs when reaching for a given product property. The next step in the optimization shows how a strategy for relaxing constraint can increase overall productivity and still reach certain product properties. The conclusions made in this work are that multi objective optimization is essential when optimizing crushing plant production against multiple objectives. Relaxation of constraints can increase the overall performance of the crushing plant.
|
|
| 8. |
- Bengtsson, Magnus, 1973, et al.
(författare)
-
Size and shape simulation in a tertiary crushing stage, a multi objective perspective
- 2015
-
Ingår i: Minerals Engineering. - : Elsevier BV. - 0892-6875 .- 1872-9444. ; 77, s. 72-77
-
Tidskriftsartikel (refereegranskat)abstract
- There is increasing demand to optimise yield and increase capacity of crushing plants. Research in this area has resulted in the development of numerous optimisation tools, and recent research has shown that the quality aspects of production have great influence on the optimisation results. The quality and capacity of a product is influenced by several parameters, and in order to control all of these parameters it is necessary to use some sort of optimisation software.In this paper, a novel approach to analyse the parameters product capacity and quality is presented. As an example a cone crusher and a vertical shaft impact crusher (VSI) is simulated in a tertiary stage. The simulation shows how capacity and product quality for a range of products will be affected when a parameter is changed. The paper also shows how wear will affect product capacity and quality.
|
|
| 9. |
- Bhadani, Kanishk, 1991, et al.
(författare)
-
Application of Multi-Disciplinary Optimization Architectures in Mineral Processing Simulations
- 2018
-
Ingår i: 11th International Comminution Symposium. - 9781510883789
-
Konferensbidrag (refereegranskat)abstract
- Optimization is a pivotal point in distinguishing the competitiveness between industries that are developing, designing and operating products and processes. Mineral processing is an industry which operates various sub-processes and produces one or several products. The sub-processes involved are dynamic in nature and differs in discipline of operation. These dynamic sub-processes are sequentially integrated forming a mineral processing system. Currently, the developed simulations for the mineral processing systems have the potential to be used to design, operate and control mineral processing plants to an increased extent, but need broader optimization strategies to integrate multiple sub-processes involved. The scope of this research is to demonstrate application of multi-disciplinary optimization (MDO) architectures into a mineral processing simulation. A case study consisting of two sub-processes of comminution and classification circuits to produce aggregate products is used to demonstrate the application of MDO architectures. The MDO architectures are compared based on problem formulation, computational resources required and validity of the results. The optimization results using MDO architectures can be used to illustrate trade-offs between different sub-processes within the considered scope. The application of MDO architectures can facilitate the linking mathematical models of various disciplines such as comminution, and liberation in mineral processing simulation.
|
|
| 10. |
- Davoodi, Ali, 1984, et al.
(författare)
-
DEM simulation of banana screen performance
- 2015
-
Ingår i: Proceedings, ;Minerals Engineerings Conference Physical Separation 2015 June 11-12...
-
Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Banana screening is an important size classification component. The screens are characterized by a high capacity for separation. The operation of screening usually takes place after crushing operation. The shape of the banana screens causes the feed material to flow rapidly and the result will be faster screening rate. The difference between banana screens and other screens is that in banana screens the screen cut size varies with the changing slope of the decks. There are number of factors that affect screening operation like inclination of discharge, open area, thickness of deck and feed rate.The aim of this paper is to simulate the screener deck with the help of DEM Simulation and to analyze different parameters that affect screener operation efficiency and optimizing the screener so that it has the best performance during the wear life of the screen media. The one deck banana screen are simulated, the result show when the value of deck thickness and deck slope increase the probability of particles passage through the apertures will be decrease.
|
|
