| 1. |
- Cedergren, Stefan, 1982, et al.
(författare)
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The effects of grain size and feed rate on notch wear and burr formation in wrought Alloy 718
- 2013
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Ingår i: International Journal of Advanced Manufacturing Technology. - : Springer Science and Business Media LLC. - 0268-3768 .- 1433-3015. ; 67:5-8, s. 1501-1507
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Tidskriftsartikel (refereegranskat)abstract
- The effect of two different workpiece material grain sizes, 16 and 127 μm, on the depth-of-cut notch wear, chip morphology, and burr formation was studied in a turning operation. A material from the same batch of wrought superalloy Alloy 718 was heat-treated to achieve the two microstructures. The machining was performed at two feed rates, 0.1 and 0.2 mm/revolution. Uncoated cemented carbide tools were used. Both grain size and feed rate were found to influence the chip morphology and the sideflow which were also associated with both the notch wear and the burr formation. The effect of the grain size on the notch wear was larger than that of the feed rate under the tested conditions, with larger grains being more detrimental than smaller ones.
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| 2. |
- Bejjani, Roland, et al.
(författare)
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Variations in the Surface Integrity of Ti-6Al-4V by Combinations of Additive and Subtractive Manufacturing Processes
- 2020
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Ingår i: Materials. - : MDPI. - 1996-1944. ; 13:8, s. 1-24
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Tidskriftsartikel (refereegranskat)abstract
- Additive manufacturing (AM) has recently been accorded considerable interest by manufacturers. Many manufacturing industries, amongst others in the aerospace sector, are already using AM parts or are investing in such manufacturing methods. Important material properties, such as microstructures, residual stress, and surface topography, can be affected by AM processes. In addition, a subtractive manufacturing (SM) process, such as machining, is required for finishing certain parts when accurate tolerances are required. This finish machining will subsequently affect the surface integrity and topography of the material. In this research work, we focused on the surface integrity of Ti-6Al-4V parts manufactured using three different types of AM and finished using an SM step. The aim of this study was to gain an understanding on how each process affects the resulting surface integrity of the material. It was found that each AM process affects the materials’ properties differently and that clear differences exist compared to a reference material manufactured using conventional methods. The newly generated surface was investigated after the SM step and each combination of AM/SM resulted in differences in surface integrity. It was found that different AM processes result in different microstructures which in turn affect surface integrity after the SM process.
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| 3. |
- Cedergren, Stefan
(författare)
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A Conceptual Evaluation Framework for Performance Measurements within Industrial Product Development
- 2009
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Konferensbidrag (refereegranskat)abstract
- The ability to deliver streams of new products to the market is more important than ever before. Still, no generally accepted performance measurement framework for product development exists. This paper outlines a performance measurement evaluation matrix, based on extensive qualitative research within large organizations developing industrial products in Sweden, that enable managers to assess what is and what is not measured in the product development process. This is important in order to continuously keep the measurement system updated according to the current needs of the organization.
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| 4. |
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| 5. |
- Cedergren, Stefan, et al.
(författare)
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A Performance Evaluation Framework for Innovation a chapter in Innovation in Business and Enterprise: Technologies and Frameworks
- 2010
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Ingår i: Innovation in Business and Enterprise. - : IGI Global. - 9781615206438 ; , s. 135-149
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- This chapter presents a framework for a conceptual evaluation of the performance of industrial product innovation activities. The framework promotes a holistic view of performance by considering three categories of activities: Planning, Implementation, and Sales and Delivery. Successful performance evaluation comes from acknowledging the fact that there are different objectives for each of the three activity categories. Moreover, performance may be expressed as a function of the performance of the Planning, the Implementation, and the Sales and Delivery activities. In this chapter the results of research involving seven large companies in Sweden, with the objective of improving the understanding of what is required to be successful when developing complex industrial products, are presented. Key factors for success as well as some general conclusions are discussed.
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| 6. |
- Cedergren, Stefan, et al.
(författare)
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A road map for future research on industrial product-service systems (IPS2) : a systematic review
- 2012
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Ingår i: The Philosopher's Stone for Sustainability. - Berlin, Heidelberg : Encyclopedia of Global Archaeology/Springer Verlag. - 9783642328466 - 9783642328473 ; , s. 185-190
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Konferensbidrag (refereegranskat)abstract
- There is an ongoing trend to expand traditional offerings of selling goods towards providing value through services to customers. In academia the term Industrial Product-Service Systems (IPS2) describes this phenomenon. Although many articles have been published on IPS2 a systematic review is lacking. This paper presents a systematic review of the IPS2 domain. Five themes characterizing IPS2 are revealed: delivery, processes, value creation networks, knowledge management, and business models. IPS2 is concluded to be both a young and distributed field of research, with a scope that needs to expand in terms of the themes covered and number of empirical studies
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| 7. |
- Cedergren, Stefan, et al.
(författare)
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Analysis of the industrial product-service systems (IPS2) literature : A systematic review
- 2012
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Ingår i: IEEE 6th International Conference on Management of Innovation and Technology, ICMIT 2012. - Piscataway, NJ : IEEE Communications Society. - 9781467301084 ; , s. 733-740
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Konferensbidrag (refereegranskat)abstract
- Successful industrial goods-delivering companies are always looking for ways to develop and grow their business. A strong present trend is to expand the traditionally tangible offering by integrating intangible offerings i.e. services. In academia the term industrial product-service systems (IPS2) are being used to describe this paradigm shift. However, a systematic review of the IPS2 literature is lacking. In this paper publications regarding IPS2 are systematically reviewed. The result of our review has been categorized under five themes that we found characterizes IPS2: delivery, processes, value creation networks, knowledge management, and business models. Based on our findings a discussion is made and future research directions are identified
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| 8. |
- Cedergren, Stefan, et al.
(författare)
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Challenges with Evaluating Performance in Product Development
- 2010. - 8
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Ingår i: 17TH INTERNATIONAL PRODUCT DEVELOPMENT MANAGEMENT CONFERENCE. - Murcia, Spain.
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Konferensbidrag (refereegranskat)abstract
- The purpose of this paper is to from a managerial perspective investigate performance evaluation practices in a product development context. The focus is on exploring how managers perceive and evaluate performance in a software-intensive product development context. The research approach pursued in this research consist of a literature review combined with focused group interviews and exploratory multiple case studies. Moreover, a number of seminars have been held to discuss the findings both in academia and in practice. The result of this research indicates that product development managers are dissatisfied with their current way of evaluating performance. Performance measurements and the perception of performance are focused on cost, time and quality, i.e. what is easily measurable and not necessarily what is important. The dimensions of value creations and learning are missing. It is argued that manager perception of performance is affected by how it is measured, hence limiting the scope of the performance criteria. Thus, a change in the way managers perceive performance is necessary before there can be any change in the way performance is evaluated. Managers within product development that are dissatisfied with their performance measurement system should focus on how the organization perceive performance. By developing relevant performance criteria the first step in developing an effective performance evaluation system is made.
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| 9. |
- Cedergren, Stefan, et al.
(författare)
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Evaluating performance in the development of software-intensive products
- 2014
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Ingår i: Information and Software Technology. - : Elsevier BV. - 0950-5849 .- 1873-6025. ; 56:5, s. 516-526
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Tidskriftsartikel (refereegranskat)abstract
- Context: Organizational performance measurements in software product development have received a lot of attention in the literature. Still, there is a general discontent regarding the way performance is evaluated in practice, with few studies really focusing on why this is the case. In this paper research focusing on the context of developing software-intensive products in large established multi-national organizations is reported on. Objective: The purpose of this research is to investigate performance measurement practices related to software product development activities. More specifically, focus is on exploring how managers engaged in software product development activities perceive and evaluate performance in large organizations from a managerial perspective. Method: The research approach pursued in this research consist of exploratory multiple case studies. Data is collected mainly through 54 interviews in five case studies in large international organizations developing software-intensive products in Sweden. Focused group interviews with senior managers from eight companies have also been used in the data collection. Results: The results of this research indicate that managers within software product development in general are dissatisfied with their current way of evaluating performance. Performance measurements and the perception of performance are today focused on cost, time, and quality, i.e. what is easily measurable and not necessarily what is important. The dimensions of value creation and learning are missing. Moreover, measurements tend to be result oriented, rather than process oriented, making it difficult to integrate these measurements in the management practices. Conclusion: Managers that are dissatisfied with their performance measurement system and want to improve the current situation should not start by focusing on the current measurements directly; instead they should focus on how the organization perceives performance and how important performance criteria are being developed. By developing relevant performance criteria the first step in developing an effective performance measurement system is made. Moreover, it is concluded that manager's perception of performance is affected by the currently used measurements, hence limiting the scope of the performance criteria. Thus, a change in the way managers perceive performance is necessary before there can be any changes in the way performance is evaluated.
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| 10. |
- Cedergren, Stefan, et al.
(författare)
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Evaluation of performance in a product development context
- 2010. - 4
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Ingår i: Business Horizons. - : Elsevier. - 0007-6813 .- 1873-6068. ; 53:4, s. 359-369
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Tidskriftsartikel (refereegranskat)abstract
- In today's competitive environment, the need is greater than ever to deploy product development investments more effectively. To assist managers, we have developed two conceptual tools to support the evaluation of performance in product development. The Performance Measurement Evaluation Matrix (PMEX) helps managers evaluate performance measurement systems they currently use, in order to identify areas requiring improvement. Results from using the PMEX indicate that it is common to associate performance measurements with the efficiency aspects of time, cost, and quality, without monitoring the value created. Performance is largely perceived by managers in terms of time, cost, and quality of the activities in the later phases of the development process. We contend that an effective performance measurement system is based on performance criteria, and then derives measurements based on these. It is argued that there should be a change in the perception of performance, before performance evaluation systems can be improved. The Product Development Organizational Performance Model (PDOPM) assists in developing the perception of performance by relating uncertainty, efficiency, and effectiveness at three generic activity levels within the product development function. The use of our tools provides an improved perception of performance and its measurement, thus enabling improvements to the evaluation of performance.
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