Blar i NTNU Open på forfatter "Ringen, Geir"
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Laser Powder Bed Fusion Additive Manufacturing of Aluminium -a Review of Challanges and Proposed Solutions
Leirmo, Julie Langedahl (Master thesis, 2020)Additiv tilvirkning (populært kalt 3D-printing) har fått mye oppmerksomhet de siste årene på grunn av dets unike muligheter som komplekse geometrier som ikke kan oppnås med tradisjonelle teknologier. Det er voksende interesse ... -
Material flow analysis: A study of primary and post-consumer scrap aluminium flow in Norway
Ruiz Fernández, Javier (Master thesis, 2022)To mitigate climate change and achieve the United Nations Sustainable Development Goals (SDGs), the world must shift from the current linear economy to a circular economy system focused on the 3Rs: reduce, reuse and ... -
Mechanical Properties of a Welded 6082 Aluminium Alloy with Local Heat Treatments
Hamarsnes, Anne (Master thesis, 2019)Denne oppgaven undersøker tre ulike lokale varmebehandlinger i kombinasjon med en utherdingsprosess etter sveising for å forbedre styrken og duktiliteten til sveiset 6082-T6 aluminium. De tre metodene skal manipulere ... -
Mechanisms for Manufacturing Systems
Holtskog, Halvor; Ringen, Geir (Journal article; Peer reviewed, 2018)Production systems have continuously evolved since early attempts to standardise parts, processes and work modes to enhance mass production. This was further refined by the Japanese automotive industry, which has been the ... -
Newness and Outcomes in Commodity-Driven New-Product Development Projects: A Survey in the Norwegian Manufacturing Industry
Beste, Carina; Welo, Torgeir; Ringen, Geir (Journal article; Peer reviewed, 2019)Based on longtime experience in the global automotive industry, we have observed steadily higher expectations in the execution of product development projects regarding time, budget and quality. This is particularly ... -
On the Substitution of Aluminium for Copper Conductors in Battery Systems
Elkjær, Aksel Sean (Doctoral theses at NTNU;2024:86, Doctoral thesis, 2024)Aluminium’s electrical conductance per-unit mass and per-unit cost is unequalled. These are two desirable properties in a world undergoing widespread electrification. Electricity generation, transmission and utilisation ... -
Opportunities in the Wake of Crisis
Holtskog, Halvor; Ringen, Geir (Journal article; Peer reviewed, 2013)This study reveals the history of a Norwegian automotive supplier that went bankruptcy during the financial crisis in 2009. The crisis swept through the industry and hit hard for those actors who already struggled to keep ... -
Organizational Learning and Knowledge in the Norwegian Automotive Supplier Industry
Ringen, Geir (Doktoravhandlinger ved NTNU, 1503-8181; 2010:160, Doctoral thesis, 2010)This study contributes to the understanding of how product and process development processes may become more effective, and provide increased competiveness, for suppliers in the Norwegian automotive industry. This industry ... -
Overcoming the limits of language in innovation projects - Exploring Design Thinking as an approach to worldview inconsistencies and innovation speed
Mitcheltree, Christina Marie (Doctoral theses at NTNU;2021:283, Doctoral thesis, 2021)Innovation is one of the foremost generators of value for organizations. Yet, keeping up with rapid technological changes and market demands requires new ways of thinking about innovation, within and between organizations. ... -
An overview and evaluation of alternative forming processes for complex aluminium products
Welo, Torgeir; Ringen, Geir; Ma, Jun (Peer reviewed; Journal article, 2020)Many industries are facing new forces that cause upheaval in the way products are designed, engineered, produced and used. Consumer preferences in terms of personalization and customization, sustainability criteria and the ... -
Product development of a gripping mechanism for a flexible 3D stretch bending machine for industrial applications - Exploring the concepts of set-based concurrent engineering
Schjøtt-Pedersen, Nikolai (Master thesis, 2018)High strength aluminum components are increasingly popular in the automotive industry. Development of novel manufacturing machines for these components is required to gain a competitive edge. An automotive parts manufacturer ... -
A strategy for on-machine springback measurement in rotary draw bending using digital image-based laser tracking
Ha, Taekwang; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen (Peer reviewed; Journal article, 2021)Rotary draw bending is a commonly used metal forming technique for profile bending. Due to the elastic recovery of the material, springback compensation to control the bent product quality is one of the critical manufacturing ... -
Studying Design Thinking as a forthcoming source to innovation speed
Mitcheltree, Christina Marie; Holtskog, Halvor; Ringen, Geir (Peer reviewed; Journal article, 2019)With complex technology-intense industries follows an ever-increasing need for rapid innovation processes. Yet, innovation speed and the time from idea to product realization can vary and be ... -
The product development learning process and its relation to performance indicators
Ringen, Geir; Welo, Torgeir (Journal article; Peer reviewed, 2018)Many companies have introduced Knowledge Management systems in product development and innovation processes to control their information and knowledge flow throughout the product lifecycle. Such systems enhance relationship ... -
Towards a shared vision in innovation projects: Understanding actor involvement as a preventative approach against defensive routines for innovation capability
Mitcheltree, Christina Marie; Holtskog, Halvor; Ringen, Geir (Peer reviewed; Journal article, 2022)This paper is based on the understanding that industrial product innovation projects often emphasize speed and economic accounts of the process without sufficiently considering the human mechanisms that drives the innovation ... -
Triads in lean management: analyzing buyer-supplier-supplier and buyer-supplier-supplier’s supplier relationships for zero-defect manufacturing.
Kovalevskaya, Daria; Pedersen, Ann-Charlott; Holmen, Elsebeth; Kaloudis, Aris; Ringen, Geir (Journal article; Peer reviewed, 2022) -
Unlocking work standards through systematic work observation: implications for team supervision
Ingvaldsen, Jonas A; Holtskog, Halvor; Ringen, Geir (Journal article; Peer reviewed, 2013)Purpose - Companies with routine operations often pursue team-based continuous improvement in the context of standardized work. Continuous improvement requires that work standards are periodically "unlocked", i.e. made ... -
User Friendly Framework for Measuring Product and Process Novelty in the Early Stages of Product Development
Ringen, Geir; Holtskog, Halvor; Martinsen, Kristian (Journal article; Peer reviewed, 2012)This paper examines the innovation process in four Norwegian companies, all supplying the automotive industry with light weight structural components. Twelve representative product projects are categorized, together with ...