Navigation

  • Skip to Content
NTNU Home NTNU Home

ntnu.edu

  • Studies
    • Master's programmes in English
    • For exchange students
    • PhD opportunities
    • All programmes of study
    • Courses
    • Financing
    • Language requirements
    • Application process
    • Academic calendar
    • FAQ
  • Research and innovation
    • NTNU research
    • Research excellence
    • Strategic research areas
    • Innovation resources
    • PhD opportunities
  • Life and housing
    • Student in Trondheim
    • Student in Gjøvik
    • Student in Ålesund
    • For researchers
    • Life and housing
  • About NTNU
    • Contact us
    • Faculties and departments
    • Libraries
    • International researcher support
    • Vacancies
    • About NTNU
    • Maps
  1. Employees

Språkvelger

Norsk

Geir Ringen

Download press photo
Download press photo
Foto:

Geir Ringen

Professor
Department of Mechanical and Industrial Engineering

geir.ringen@ntnu.no
+4773593816 Verkstedteknisk, Gløshaugen
Publications Teaching Outreach

Publications

  • Chronological
  • By category
  • See all publications in Cristin

2024

  • Sarkar, Aritra; Aktunali, Mehmet; Arbo, Siri Marthe; Holmestad, Jon; Viespoli, Luigi Mario; Nyhus, Bård. (2024) A study on the influence of impurity content on fatigue endurance in a 6082 Al-alloy. International Journal of Fatigue
    Academic article
  • Ha, Taekwang; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2024) Smart Control of Springback in Stretch Bending of a Rectangular Tube by an Artificial Neural Network. Journal of Manufacturing Science and Engineering
    Academic article
  • Tabosa Da Silva, Ana Lyvia; Agudelo Assuad, Carla Susana; Ringen, Geir. (2024) A data management framework for life cycle simulation in extruded Aluminium products production. Procedia CIRP
    Academic article
  • Ha, Taekwang; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2024) Formability prediction of perforated sheet metal by representative volume element and homogenized sheet models. Manufacturing Letters
    Academic article
  • Øien, Christian Dalheim; Ringen, Geir. (2024) Data-driven through-process modelling of aluminum extrusion: Predicting mechanical properties. Manufacturing Letters
    Academic article

2023

  • Ringen, Geir. (2023) Case innen verdikjedebetraktninger i Industri 4.0. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Sariyarlioglu, Eren Can; Negozio, Marco; Ma, Jun; Welo, Torgeir; Ringen, Geir. (2023) Effect of Die Design on Charge Welds in Aluminium Extrusion. Springer Springer
    Academic anthology/Conference proceedings
  • Akram, Md Ali; Holthe, Ragnar; Ringen, Geir. (2023) Rapid Sorting of Post-consumer Scrap Aluminium Alloys Based on Laser-Induced Breakdown Spectroscopy (LIBS). IFIP Advances in Information and Communication Technology
    Academic article
  • Ringen, Geir. (2023) Produktutvikling. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Assuad, Carla Susana A; Øien, Christian Dalheim; Ringen, Geir. (2023) Circularity assessment of the effects of customer preferences towards sustainable development on producers for aluminum-based products in Norway. Procedia CIRP
    Academic article
  • Sarkar, Aritra; Razavi, Nima; Ringen, Geir; Welo, Torgeir. (2023) Assessing the fatigue behaviour of recycled Al-alloys: A critical review. Materialia
    Academic article
  • Ha, Taekwang; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2023) On Kinematics in Sequential Three-Dimensional Stretch Bending: Analytical Springback Model. Journal of Manufacturing Science and Engineering
    Academic article

2022

  • Ringen, Geir; Welo, Torgeir; Breivik, Sissel Marie. (2022) Rapid Manufacturing of Die-casting Tools - a Case Study. Procedia CIRP
    Academic article
  • Elkjær, Aksel Sean; Sørhaug, Jørgen A; Ringen, Geir; Bjørge, Ruben; Grong, Øystein. (2022) Electrical and thermal stability of Al-Cu welds: Performance benchmarking of the hybrid metal extrusion and bonding process. Journal of Manufacturing Processes
    Academic article
  • Shafqat, Ali; Oehmen, Josef; Welo, Torgeir; Ringen, Geir. (2022) The role of risk mitigation actions in engineering projects: An empirical investigation. Systems Engineering
    Academic article
  • Ma, Jun; Tronvoll, Sigmund Arntsønn; Welo, Torgeir; Ringen, Geir. (2022) On Dimensional Control in Rotary Stretch Bending of Aluminum Profiles: Loading-Path Effects. Manufacturing Letters
    Academic article
  • Kovalevskaya, Daria; Pedersen, Ann-Charlott; Holmen, Elsebeth; Kaloudis, Aris; Ringen, Geir. (2022) Triads in Lean Management: Analyzing Buyer–Supplier-Supplier and Buyer–Supplier-Supplier’s Supplier Relationships for Zero-Defect Manufacturing. Journal of the Knowledge Economy
    Academic article
  • Mitcheltree, Christina Marie; Holtskog, Halvor; Ringen, Geir. (2022) Towards a shared vision in innovation projects: Understanding actor involvement as a preventative approach against defensive routines for innovation capability. Procedia CIRP
    Academic article
  • Ringen, Geir. (2022) Value Chain Data Integrity and Quality - A Case Study. INCOSE International Symposium
    Academic article
  • Fragapane, Giuseppe; Schulte, Kjersti Øverbø; Eleftheriadis, Ragnhild; Reke, Eivind; Ringen, Geir. (2022) A Cross-disciplinary, cross-organizational approach to sustainable design and product innovation in the aluminum industry . Procedia CIRP
    Academic article
  • Ringen, Geir; Landsem, Kristin Lorentzen; Holtskog, Halvor. (2022) Design for Excellence to Explore Complex Product Service Systems: A Case Study. Procedia CIRP
    Academic article
  • Elkjær, Aksel Sean; Ringen, Geir; Bjørge, Ruben; Hagen, Catalina Hoem Musinoi; Lædre, Sigrid; Magnusson, Niklas. (2022) Reliability of Bolted Aluminum Busbars for Battery Systems: Effect of Nickel Coating and Corrosive Environment. IEEE Transactions on Transportation Electrification
    Academic article

2021

  • Hansen, Irina-Emily; Mork, Ola Jon; Welo, Torgeir; Ringen, Geir. (2021) Bridging the ‘Valley of Death’: Can Agile Principles Be Applied in Industry-Academia Research and Innovation Projects?. Journal of the Knowledge Economy
    Academic article
  • Ha, Taekwang; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2021) A strategy for on-machine springback measurement in rotary draw bending using digital image-based laser tracking. The International Journal of Advanced Manufacturing Technology
    Academic article
  • Ringen, Geir; Welo, Torgeir. (2021) Material substitution innovation - trajectories towards circular economy. ISPIM Lappeenranta University of Technology Press
    Academic chapter/article/Conference paper

2020

  • Holtskog, Halvor; Ringen, Geir. (2020) The insufficiency of lean tradition - Lean meets kodak moments. Procedia CIRP
    Academic article
  • Welo, Torgeir; Ringen, Geir; Rossi, Monica. (2020) Investigating Maturity of Lean Culture in Product Development Teams. Lecture Notes in Networks and Systems
    Academic article
  • Ha, Taekwang; Ma, Jun; Blindheim, Jørgen; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2020) In-line Springback Measurement for Tube Bending Using a Laser System. Procedia Manufacturing
    Academic article
  • Ma, Jun; Ha, Taekwang; Blindheim, Jørgen; Welo, Torgeir; Ringen, Geir; Li, Heng. (2020) Exploring the Influence of Pre/Post-Aging on Springback in Al-Mg-Si Alloy Tube Bending. Procedia Manufacturing
    Academic article
  • Ringen, Geir; Welo, Torgeir. (2020) Material substitution innovation - trajectories towards circular economy. ISPIM Lappeenranta University of Technology Press
    Academic chapter/article/Conference paper
  • Welo, Torgeir; Ringen, Geir; Ma, Jun. (2020) An overview and evaluation of alternative forming processes for complex aluminium products. Procedia Manufacturing
    Academic article
  • Ha, Taekwang; Murudkar, Rahul; Hartwig, Karl; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2020) A feasibility study of continuous grain refinement of sheet metal. Procedia Manufacturing
    Academic article
  • Ringen, Geir; Holtskog, Halvor; Welo, Torgeir. (2020) A Novel Value Driven Co-creation Framework. Springer Nature
    Academic chapter/article/Conference paper
  • Ringen, Geir; Pålsrud, Frode Gulbrandsen; Lodgaard, Eirin Anita. (2020) Interorganizational Learning in Manufacturing Networks. Springer Nature
    Academic chapter/article/Conference paper
  • Welo, Torgeir; Ma, Jun; Blindheim, Jørgen; Ha, Taekwang; Ringen, Geir. (2020) Flexible 3D Stretch Bending of Aluminium Alloy Profiles: An Experimental and Numerical Study. Procedia Manufacturing
    Academic article

2019

  • Barua, Deep; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2019) An experimental study on interference friction welding process. Procedia Manufacturing
    Academic article
  • Mitcheltree, Christina Marie; Holtskog, Halvor; Ringen, Geir. (2019) Studying design thinking as a forthcoming source to innovation speed. Proceedings of the International Conference on Engineering Design
    Academic article
  • Schjøtt-Pedersen, Nikolai; Welo, Torgeir; Ringen, Geir; Raknes, Christian Arne. (2019) Using set-based design for developing a 3D metal forming process. Procedia CIRP
    Academic article
  • Beste, Carina; Welo, Torgeir; Ringen, Geir. (2019) Newness and Outcomes in Commodity-Driven New-Product Development Projects: A Survey in the Norwegian Manufacturing Industry. Procedia CIRP
    Academic article
  • Welo, Torgeir; Lycke, Atle; Ringen, Geir. (2019) Investigating the use of set-based concurrent engineering in product manufacturing companies. Procedia CIRP
    Academic article

2018

  • Holtskog, Halvor; Ringen, Geir. (2018) Social mechanisms of performance systems. European Journal of Workplace Innovation
    Academic article
  • Holtskog, Halvor; Lied, Lars Harald; Ringen, Geir. (2018) Coping with technology: A future of robots?. Routledge
    Academic chapter/article/Conference paper
  • Ringen, Geir; Welo, Torgeir. (2018) The product development learning process and its relation to performance indicators . Procedia Manufacturing
    Academic article
  • Welo, Torgeir; Ringen, Geir. (2018) Investigating Organizational Knowledge Transformation Capabilities in Integrated Manufacturing and Product Development Companies. Procedia CIRP
    Academic article
  • Holtskog, Halvor; Carayannis, Elias G.; Kaloudis, Aris; Ringen, Geir. (2018) Learning Factories: The Nordic Model of Manufacturing. Palgrave Macmillan Palgrave Macmillan
    Academic monograph

2017

  • Ringen, Geir; Schulte, Kjersti Øverbø. (2017) Continuous vs step change production process improvement as enablers for product redesign and new market opportunities. IFIP Advances in Information and Communication Technology
    Academic article
  • Welo, Torgeir; Ringen, Geir. (2017) Lean assessment and transformation strategies in product development: A longitudinal study. Proceedings of the International Conference on Engineering Design
    Academic article

2016

  • Welo, Torgeir; Ringen, Geir. (2016) Beyond Waste Elimination: Assessing Lean Practices in Product Development. Procedia CIRP
    Academic article
  • Holtskog, Halvor; Martinsen, Kristian; Skogsrød, Torbjørn; Ringen, Geir. (2016) The Pivoting Problem of Lean. Procedia CIRP
    Academic literature review
  • Lodgaard, Eirin Anita; Ringen, Geir; Larsson, Catrine Eleonor. (2016) Viewing the engineering change process from a lean product development and a business perspective. Journal of the Knowledge Economy
    Academic article
  • Welo, Torgeir; Ringen, Geir. (2016) Customer-focused development practices in Systems Engineering companies A case study across industry sectors. IEEE conference proceedings
    Academic chapter/article/Conference paper
  • Ringen, Geir; Welo, Torgeir; Østerbø, Emma. (2016) Learning and Knowledge Systems in Product Development Environments. Procedia CIRP
    Academic article

2015

  • Ringen, Geir; Welo, Torgeir. (2015) Knowledge Based Development Practices in Systems Engineering Companies: A Comparative Study. Curran Associates, Inc.
    Academic chapter/article/Conference paper
  • Welo, Torgeir; Ringen, Geir. (2015) Investigating lean development practices in SE companies: A comparative study between sectors. Procedia Computer Science
    Academic article

2014

  • Ringen, Geir; Welo, Torgeir. (2014) Stabilizing new-product development processes – a prerequisite or a barrier to satisfy customer wants and needs?. Procedia CIRP
    Academic article
  • Ringen, Geir; Aschehoug, Silje Helene; Holtskog, Halvor; Ingvaldsen, Jonas A. (2014) Integrating Quality and Lean into a Holistic Production System. Procedia CIRP
    Academic article
  • Ringen, Geir; Rolfsen, Monica. (2014) Lean kommune. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Ringen, Geir; Rolfsen, Monica. (2014) Lean blir norsk. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Ingvaldsen, Jonas A; Ringen, Geir. (2014) Første verktøyskuff: Standardisering. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Ingvaldsen, Jonas A; Ringen, Geir. (2014) Tredje verktøyskuff: Visualisering. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Ingvaldsen, Jonas A; Ringen, Geir; Rolfsen, Monica. (2014) Lean på global vandring. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Ingvaldsen, Jonas A; Netland, Torbjørn H.; Ringen, Geir. (2014) Step changes in mature production systems. NTNU, IØT
    Report
  • Ringen, Geir; Lodgaard, Eirin Anita. (2014) Fjerde verktøyskuff: Kontinuerlig forbedring. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Aschehoug, Silje Helene; Schulte, Kjersti Øverbø; Ringen, Geir. (2014) Early Innovation Leadership. The Design Society
    Academic chapter/article/Conference paper

2013

  • Welo, Torgeir; Aschehoug, Silje Helene; Ringen, Geir. (2013) Assessing the Relationship between New Product Development Practices and Performance in the Norwegian Manufacturing Industry. Springer
    Academic chapter/article/Conference paper
  • Ringen, Geir; Holtskog, Halvor. (2013) How enablers for lean product development motivate engineers. International journal of computer integrated manufacturing (Print)
    Academic article
  • Ingvaldsen, Jonas A; Holtskog, Halvor; Ringen, Geir. (2013) Unlocking work standards through systematic work observation: implications for team supervision. Team Performance Management
    Academic article
  • Holtskog, Halvor; Ringen, Geir. (2013) Opportunities in the Wake of Crisis. Procedia CIRP
    Academic article

2012

  • Ringen, Geir; Holtskog, Halvor; Martinsen, Kristian. (2012) User Friendly Framework for Measuring Product and Process Novelty in the Early Stages of Product Development. Procedia CIRP
    Academic article
  • Ringen, Geir; Henriksen, Ottar; Myklebust, Odd. (2012) Raufoss Technology Globalization Straegies and Implementation. Tapir Akademisk Forlag
    Academic chapter/article/Conference paper
  • Welo, Torgeir; Ringen, Geir. (2012) NPD Practices in the Norwegian Manufacturing Industry: Assessing the Relationship between Key Dimensions and Performance.
    Other
  • Aschehoug, Silje Helene; Boks, Casper; Ringen, Geir; Aasland, Knut Einar. (2012) Investigating the importance of sustainability information in Product Development and Design. The Design Society
    Academic chapter/article/Conference paper

2011

  • Lodgaard, Eirin Anita; Pellegård, Øystein; Ringen, Geir; Klokkehaug, Jon Andreas. (2011) Failure Mode and Effects Analysis in Combination with the Problem-Solving A3. The Design Society
    Other

2009

  • Fleten, Stein-Erik; Ringen, Geir. (2009) New renewable electricity capacity under uncertainty: The potential in Norway. Journal of Energy Markets
    Academic article

2008

  • Ringen, Geir; Sørby, Knut; Martinsen, Kristian. (2008) High-pressure coolant chip control in boring of aluminium alloys.
    Academic chapter/article/Conference paper

2006

  • Fleten, Stein-Erik; Ringen, Geir. (2006) New Renewable Electricity Capacity under Uncertainty: The Potential in Norway.
    Academic chapter/article/Conference paper

Journal publications

  • Sarkar, Aritra; Aktunali, Mehmet; Arbo, Siri Marthe; Holmestad, Jon; Viespoli, Luigi Mario; Nyhus, Bård. (2024) A study on the influence of impurity content on fatigue endurance in a 6082 Al-alloy. International Journal of Fatigue
    Academic article
  • Ha, Taekwang; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2024) Smart Control of Springback in Stretch Bending of a Rectangular Tube by an Artificial Neural Network. Journal of Manufacturing Science and Engineering
    Academic article
  • Tabosa Da Silva, Ana Lyvia; Agudelo Assuad, Carla Susana; Ringen, Geir. (2024) A data management framework for life cycle simulation in extruded Aluminium products production. Procedia CIRP
    Academic article
  • Ha, Taekwang; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2024) Formability prediction of perforated sheet metal by representative volume element and homogenized sheet models. Manufacturing Letters
    Academic article
  • Øien, Christian Dalheim; Ringen, Geir. (2024) Data-driven through-process modelling of aluminum extrusion: Predicting mechanical properties. Manufacturing Letters
    Academic article
  • Akram, Md Ali; Holthe, Ragnar; Ringen, Geir. (2023) Rapid Sorting of Post-consumer Scrap Aluminium Alloys Based on Laser-Induced Breakdown Spectroscopy (LIBS). IFIP Advances in Information and Communication Technology
    Academic article
  • Assuad, Carla Susana A; Øien, Christian Dalheim; Ringen, Geir. (2023) Circularity assessment of the effects of customer preferences towards sustainable development on producers for aluminum-based products in Norway. Procedia CIRP
    Academic article
  • Sarkar, Aritra; Razavi, Nima; Ringen, Geir; Welo, Torgeir. (2023) Assessing the fatigue behaviour of recycled Al-alloys: A critical review. Materialia
    Academic article
  • Ha, Taekwang; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2023) On Kinematics in Sequential Three-Dimensional Stretch Bending: Analytical Springback Model. Journal of Manufacturing Science and Engineering
    Academic article
  • Ringen, Geir; Welo, Torgeir; Breivik, Sissel Marie. (2022) Rapid Manufacturing of Die-casting Tools - a Case Study. Procedia CIRP
    Academic article
  • Elkjær, Aksel Sean; Sørhaug, Jørgen A; Ringen, Geir; Bjørge, Ruben; Grong, Øystein. (2022) Electrical and thermal stability of Al-Cu welds: Performance benchmarking of the hybrid metal extrusion and bonding process. Journal of Manufacturing Processes
    Academic article
  • Shafqat, Ali; Oehmen, Josef; Welo, Torgeir; Ringen, Geir. (2022) The role of risk mitigation actions in engineering projects: An empirical investigation. Systems Engineering
    Academic article
  • Ma, Jun; Tronvoll, Sigmund Arntsønn; Welo, Torgeir; Ringen, Geir. (2022) On Dimensional Control in Rotary Stretch Bending of Aluminum Profiles: Loading-Path Effects. Manufacturing Letters
    Academic article
  • Kovalevskaya, Daria; Pedersen, Ann-Charlott; Holmen, Elsebeth; Kaloudis, Aris; Ringen, Geir. (2022) Triads in Lean Management: Analyzing Buyer–Supplier-Supplier and Buyer–Supplier-Supplier’s Supplier Relationships for Zero-Defect Manufacturing. Journal of the Knowledge Economy
    Academic article
  • Mitcheltree, Christina Marie; Holtskog, Halvor; Ringen, Geir. (2022) Towards a shared vision in innovation projects: Understanding actor involvement as a preventative approach against defensive routines for innovation capability. Procedia CIRP
    Academic article
  • Ringen, Geir. (2022) Value Chain Data Integrity and Quality - A Case Study. INCOSE International Symposium
    Academic article
  • Fragapane, Giuseppe; Schulte, Kjersti Øverbø; Eleftheriadis, Ragnhild; Reke, Eivind; Ringen, Geir. (2022) A Cross-disciplinary, cross-organizational approach to sustainable design and product innovation in the aluminum industry . Procedia CIRP
    Academic article
  • Ringen, Geir; Landsem, Kristin Lorentzen; Holtskog, Halvor. (2022) Design for Excellence to Explore Complex Product Service Systems: A Case Study. Procedia CIRP
    Academic article
  • Elkjær, Aksel Sean; Ringen, Geir; Bjørge, Ruben; Hagen, Catalina Hoem Musinoi; Lædre, Sigrid; Magnusson, Niklas. (2022) Reliability of Bolted Aluminum Busbars for Battery Systems: Effect of Nickel Coating and Corrosive Environment. IEEE Transactions on Transportation Electrification
    Academic article
  • Hansen, Irina-Emily; Mork, Ola Jon; Welo, Torgeir; Ringen, Geir. (2021) Bridging the ‘Valley of Death’: Can Agile Principles Be Applied in Industry-Academia Research and Innovation Projects?. Journal of the Knowledge Economy
    Academic article
  • Ha, Taekwang; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2021) A strategy for on-machine springback measurement in rotary draw bending using digital image-based laser tracking. The International Journal of Advanced Manufacturing Technology
    Academic article
  • Holtskog, Halvor; Ringen, Geir. (2020) The insufficiency of lean tradition - Lean meets kodak moments. Procedia CIRP
    Academic article
  • Welo, Torgeir; Ringen, Geir; Rossi, Monica. (2020) Investigating Maturity of Lean Culture in Product Development Teams. Lecture Notes in Networks and Systems
    Academic article
  • Ha, Taekwang; Ma, Jun; Blindheim, Jørgen; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2020) In-line Springback Measurement for Tube Bending Using a Laser System. Procedia Manufacturing
    Academic article
  • Ma, Jun; Ha, Taekwang; Blindheim, Jørgen; Welo, Torgeir; Ringen, Geir; Li, Heng. (2020) Exploring the Influence of Pre/Post-Aging on Springback in Al-Mg-Si Alloy Tube Bending. Procedia Manufacturing
    Academic article
  • Welo, Torgeir; Ringen, Geir; Ma, Jun. (2020) An overview and evaluation of alternative forming processes for complex aluminium products. Procedia Manufacturing
    Academic article
  • Ha, Taekwang; Murudkar, Rahul; Hartwig, Karl; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2020) A feasibility study of continuous grain refinement of sheet metal. Procedia Manufacturing
    Academic article
  • Welo, Torgeir; Ma, Jun; Blindheim, Jørgen; Ha, Taekwang; Ringen, Geir. (2020) Flexible 3D Stretch Bending of Aluminium Alloy Profiles: An Experimental and Numerical Study. Procedia Manufacturing
    Academic article
  • Barua, Deep; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2019) An experimental study on interference friction welding process. Procedia Manufacturing
    Academic article
  • Mitcheltree, Christina Marie; Holtskog, Halvor; Ringen, Geir. (2019) Studying design thinking as a forthcoming source to innovation speed. Proceedings of the International Conference on Engineering Design
    Academic article
  • Schjøtt-Pedersen, Nikolai; Welo, Torgeir; Ringen, Geir; Raknes, Christian Arne. (2019) Using set-based design for developing a 3D metal forming process. Procedia CIRP
    Academic article
  • Beste, Carina; Welo, Torgeir; Ringen, Geir. (2019) Newness and Outcomes in Commodity-Driven New-Product Development Projects: A Survey in the Norwegian Manufacturing Industry. Procedia CIRP
    Academic article
  • Welo, Torgeir; Lycke, Atle; Ringen, Geir. (2019) Investigating the use of set-based concurrent engineering in product manufacturing companies. Procedia CIRP
    Academic article
  • Holtskog, Halvor; Ringen, Geir. (2018) Social mechanisms of performance systems. European Journal of Workplace Innovation
    Academic article
  • Ringen, Geir; Welo, Torgeir. (2018) The product development learning process and its relation to performance indicators . Procedia Manufacturing
    Academic article
  • Welo, Torgeir; Ringen, Geir. (2018) Investigating Organizational Knowledge Transformation Capabilities in Integrated Manufacturing and Product Development Companies. Procedia CIRP
    Academic article
  • Ringen, Geir; Schulte, Kjersti Øverbø. (2017) Continuous vs step change production process improvement as enablers for product redesign and new market opportunities. IFIP Advances in Information and Communication Technology
    Academic article
  • Welo, Torgeir; Ringen, Geir. (2017) Lean assessment and transformation strategies in product development: A longitudinal study. Proceedings of the International Conference on Engineering Design
    Academic article
  • Welo, Torgeir; Ringen, Geir. (2016) Beyond Waste Elimination: Assessing Lean Practices in Product Development. Procedia CIRP
    Academic article
  • Holtskog, Halvor; Martinsen, Kristian; Skogsrød, Torbjørn; Ringen, Geir. (2016) The Pivoting Problem of Lean. Procedia CIRP
    Academic literature review
  • Lodgaard, Eirin Anita; Ringen, Geir; Larsson, Catrine Eleonor. (2016) Viewing the engineering change process from a lean product development and a business perspective. Journal of the Knowledge Economy
    Academic article
  • Ringen, Geir; Welo, Torgeir; Østerbø, Emma. (2016) Learning and Knowledge Systems in Product Development Environments. Procedia CIRP
    Academic article
  • Welo, Torgeir; Ringen, Geir. (2015) Investigating lean development practices in SE companies: A comparative study between sectors. Procedia Computer Science
    Academic article
  • Ringen, Geir; Welo, Torgeir. (2014) Stabilizing new-product development processes – a prerequisite or a barrier to satisfy customer wants and needs?. Procedia CIRP
    Academic article
  • Ringen, Geir; Aschehoug, Silje Helene; Holtskog, Halvor; Ingvaldsen, Jonas A. (2014) Integrating Quality and Lean into a Holistic Production System. Procedia CIRP
    Academic article
  • Ringen, Geir; Holtskog, Halvor. (2013) How enablers for lean product development motivate engineers. International journal of computer integrated manufacturing (Print)
    Academic article
  • Ingvaldsen, Jonas A; Holtskog, Halvor; Ringen, Geir. (2013) Unlocking work standards through systematic work observation: implications for team supervision. Team Performance Management
    Academic article
  • Holtskog, Halvor; Ringen, Geir. (2013) Opportunities in the Wake of Crisis. Procedia CIRP
    Academic article
  • Ringen, Geir; Holtskog, Halvor; Martinsen, Kristian. (2012) User Friendly Framework for Measuring Product and Process Novelty in the Early Stages of Product Development. Procedia CIRP
    Academic article
  • Fleten, Stein-Erik; Ringen, Geir. (2009) New renewable electricity capacity under uncertainty: The potential in Norway. Journal of Energy Markets
    Academic article

Books

  • Sariyarlioglu, Eren Can; Negozio, Marco; Ma, Jun; Welo, Torgeir; Ringen, Geir. (2023) Effect of Die Design on Charge Welds in Aluminium Extrusion. Springer Springer
    Academic anthology/Conference proceedings
  • Holtskog, Halvor; Carayannis, Elias G.; Kaloudis, Aris; Ringen, Geir. (2018) Learning Factories: The Nordic Model of Manufacturing. Palgrave Macmillan Palgrave Macmillan
    Academic monograph

Part of book/report

  • Ringen, Geir. (2023) Case innen verdikjedebetraktninger i Industri 4.0. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Ringen, Geir. (2023) Produktutvikling. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Ringen, Geir; Welo, Torgeir. (2021) Material substitution innovation - trajectories towards circular economy. ISPIM Lappeenranta University of Technology Press
    Academic chapter/article/Conference paper
  • Ringen, Geir; Welo, Torgeir. (2020) Material substitution innovation - trajectories towards circular economy. ISPIM Lappeenranta University of Technology Press
    Academic chapter/article/Conference paper
  • Ringen, Geir; Holtskog, Halvor; Welo, Torgeir. (2020) A Novel Value Driven Co-creation Framework. Springer Nature
    Academic chapter/article/Conference paper
  • Ringen, Geir; Pålsrud, Frode Gulbrandsen; Lodgaard, Eirin Anita. (2020) Interorganizational Learning in Manufacturing Networks. Springer Nature
    Academic chapter/article/Conference paper
  • Holtskog, Halvor; Lied, Lars Harald; Ringen, Geir. (2018) Coping with technology: A future of robots?. Routledge
    Academic chapter/article/Conference paper
  • Welo, Torgeir; Ringen, Geir. (2016) Customer-focused development practices in Systems Engineering companies A case study across industry sectors. IEEE conference proceedings
    Academic chapter/article/Conference paper
  • Ringen, Geir; Welo, Torgeir. (2015) Knowledge Based Development Practices in Systems Engineering Companies: A Comparative Study. Curran Associates, Inc.
    Academic chapter/article/Conference paper
  • Ringen, Geir; Rolfsen, Monica. (2014) Lean kommune. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Ringen, Geir; Rolfsen, Monica. (2014) Lean blir norsk. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Ingvaldsen, Jonas A; Ringen, Geir. (2014) Første verktøyskuff: Standardisering. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Ingvaldsen, Jonas A; Ringen, Geir. (2014) Tredje verktøyskuff: Visualisering. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Ingvaldsen, Jonas A; Ringen, Geir; Rolfsen, Monica. (2014) Lean på global vandring. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Ringen, Geir; Lodgaard, Eirin Anita. (2014) Fjerde verktøyskuff: Kontinuerlig forbedring. Fagbokforlaget
    Academic chapter/article/Conference paper
  • Aschehoug, Silje Helene; Schulte, Kjersti Øverbø; Ringen, Geir. (2014) Early Innovation Leadership. The Design Society
    Academic chapter/article/Conference paper
  • Welo, Torgeir; Aschehoug, Silje Helene; Ringen, Geir. (2013) Assessing the Relationship between New Product Development Practices and Performance in the Norwegian Manufacturing Industry. Springer
    Academic chapter/article/Conference paper
  • Ringen, Geir; Henriksen, Ottar; Myklebust, Odd. (2012) Raufoss Technology Globalization Straegies and Implementation. Tapir Akademisk Forlag
    Academic chapter/article/Conference paper
  • Welo, Torgeir; Ringen, Geir. (2012) NPD Practices in the Norwegian Manufacturing Industry: Assessing the Relationship between Key Dimensions and Performance.
    Other
  • Aschehoug, Silje Helene; Boks, Casper; Ringen, Geir; Aasland, Knut Einar. (2012) Investigating the importance of sustainability information in Product Development and Design. The Design Society
    Academic chapter/article/Conference paper
  • Lodgaard, Eirin Anita; Pellegård, Øystein; Ringen, Geir; Klokkehaug, Jon Andreas. (2011) Failure Mode and Effects Analysis in Combination with the Problem-Solving A3. The Design Society
    Other
  • Ringen, Geir; Sørby, Knut; Martinsen, Kristian. (2008) High-pressure coolant chip control in boring of aluminium alloys.
    Academic chapter/article/Conference paper
  • Fleten, Stein-Erik; Ringen, Geir. (2006) New Renewable Electricity Capacity under Uncertainty: The Potential in Norway.
    Academic chapter/article/Conference paper

Report

  • Ingvaldsen, Jonas A; Netland, Torbjørn H.; Ringen, Geir. (2014) Step changes in mature production systems. NTNU, IØT
    Report

Teaching

Courses

  • TØL4015 - Project work
  • MM8500 - Innovasjon knyttet til komplekse systemer
  • TPK4142 - Innovasjon, design og produksjon 2
  • TØL4007 - Product Development
  • TMM4960 - Produktutvikling og materialer, masteroppgave
  • IØ6571 - Innføring i morgendagens digitale organisasjoner
  • TMM4540 - Industriell IKT produktutvikling og materialer, fordypningsprosjekt
  • TMM4560 - Produktutvikling og materialer, fordypningsprosjekt
  • TMM4285 - Livsløpsytelse for aluminiumsprodukter
  • TMM4280 - Avansert produktutvikling
  • TMM4935 - Industriell IKT, masteroppgave
  • TMM4182 - Metallforming og tilhørende bærekraftige produksjonsprosesser

Outreach

2023

  • Academic lecture
    Ringen, Geir; Furu, Trond. (2023) Aluminium long span suspension bridges - ambitions, opportunities and challenges. AluQuebec and REGAL 15th International Aluminium Conference - INALCO , Quebec 2023-10-11 - 2023-11-13
  • Academic lecture
    Sariyarlioglu, Eren Can; Negozio, Marco; Ma, Jun; Welo, Torgeir; Ringen, Geir. (2023) Effect of Die Design on Charge Welds in Aluminium Extrusion. The 14th International Conference on the Technology of Plasticity , Mandelieu - La Napoule 2023-09-24 - 2023-09-29
  • Academic lecture
    Holthe, Ragnar; Ringen, Geir. (2023) Rapid Sorting of Post-consumer Scrap Aluminium Alloys Based on Laser-Induced Breakdown Spectroscopy (LIBS). APMS 2023 IFIP International Conference on Advances in Production Management Systems , Trondheim 2023-09-18 - 2023-09-20
  • Academic lecture
    Ha, Taekwang; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2023) On Kinematics in Sequential Three-Dimensional Stretch Bending: Analytical Springback Model. International Manufacturing Science and Engineering Conference (MSEC 2023) , New Brunswick 2023-06-12 - 2023-06-13
  • Academic lecture
    Ringen, Geir; Sandnes, Lise; Welo, Torgeir; Rolle, R.. (2023) The effect of gap variations on the quality of thick-walled FSW joints. The 12th Aluminium Two Thousand World Congress , Bologna 2023-09-18 - 2023-09-22
  • Academic lecture
    Welo, Torgeir; Ringen, Geir. (2023) Factors impacting implementation of Lean in Engineering. LSS World Lean Six Sigma World Conference , Orlando 2023-03-15 - 2023-03-16

2022

  • Academic lecture
    Ringen, Geir; Welo, Torgeir. (2022) Framework for Predicting Dimensional Accuracy of 3D-Formed Aluminum Profiles – Based on Industry 4.0 Principles. AEC ET22 - Aluminum Extruders Council 2022-05-03 - 2022-05-05

2021

  • Academic lecture
    Ma, Jun; Tronvoll, Sigmund Arntsønn; Welo, Torgeir; Ringen, Geir. (2021) On Dimensional Control in Rotary Stretch Bending of Aluminum Profiles: Loading-Path Effects. Purdue University 50th SME North American Manufacturing Research Conference (NAMRC 50, 2022) , West Lafayette 2021-06-27 - 2021-07-01
  • Academic lecture
    Ringen, Geir; Welo, Torgeir. (2021) Material substitution innovation - trajectories towards circular economy. ISPIM XXXII ISPIM Innovation Conference - Innovating Our Common Future , Berlin 2021-06-20 - 2021-06-23
  • Academic lecture
    Ha, Taekwang; Ma, Jun; Blindheim, Jørgen; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2021) A computer vision-based, in-situ springback monitoring technique for bending of large profiles. Liege Univeristy 24th International Conference on Material Forming , Liege 2021-04-14 - 2021-04-16
  • Academic lecture
    Ma, Jun; Welo, Torgeir; Ringen, Geir. (2021) Efficient Prediction of Real-Time Forming Forces in Flexible Stretch Bending. Liege Univeristy 24th International Conference on Material Forming , Liege 2021-04-14 - 2021-04-16

2020

  • Academic lecture
    Ringen, Geir; Lodgaard, Eirin Anita. (2020) Interorganizational Learning in Manufacturing Networks. APMS APMS 2020 , Novi Sad 2020-08-30 - 2020-09-03
  • Academic lecture
    Ma, Jun; Ha, Taekwang; Welo, Torgeir; Blindheim, Jørgen; Ringen, Geir. (2020) Exploring the Influence of Pre/Post-Aging on Springback in Al-Mg-Si Alloy Tube Bending. European Scientific Association for Materials Forming 23rd International Conference on Material Forming 2020-05-04 - 2020-05-08
  • Academic lecture
    Ha, Taekwang; Ma, Jun; Blindheim, Jørgen; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2020) In-line Springback Measurement for Tube Bending Using a Laser System. European Scientific Association for Materials Forming 23rd International Conference on Material Forming 2020-05-04 - 2020-05-08
  • Academic lecture
    Welo, Torgeir; Ma, Jun; Blindheim, Jørgen; Ha, Taekwang; Ringen, Geir. (2020) Flexible 3D Stretch Bending of Aluminium Alloy Profiles: An Experimental and Numerical Study. AGH University of Science and Technology 18th International Conference on Metal Forming 2020-09-13 - 2020-09-16
  • Academic lecture
    Ha, Taekwang; Murudkar, Rahul; Hartwig, Karl; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen. (2020) A feasibility study of continuous grain refinement of sheet metal. SME 48th SME North American Manufacturing Research Conference 2020-06-22 - 2020-06-26

2018

  • Academic lecture
    Huang, Lizhen; Martinsen, Kristian; Holtskog, Halvor; Ringen, Geir. (2018) Data driven recycling: products as plastic bank. Univerisity i Agder Coping with the future , Kristansand 2018-10-08 - 2018-10-10
  • Academic lecture
    Holtskog, Halvor; Ringen, Geir; Ennals, Richard. (2018) The insufficiency of Lean thinking and how to build an alternative powerful and persuasive thinking. UiA and NTNU Coping with the Future - conference , Kristiansand 2018-10-08 - 2018-10-10

2014

  • Academic lecture
    Aschehoug, Silje Helene; Schulte, Kjersti Øverbø; Ringen, Geir. (2014) Early Innovation Leadership. The Design Society 2014 NordDesign 2014 , Espoo 2014-08-27 - 2014-08-29

2013

  • Academic lecture
    Aschehoug, Silje Helene; Ringen, Geir. (2013) Open Innovation and Idea Generation in SMEs. The Design Society ICED 13 , Seoul 2013-08-19 - 2013-08-22
  • Academic lecture
    Welo, Torgeir; Ringen, Geir. (2013) Implementing an Event-Driven NPD Process: A Case Study of Absorptive Capacity of the Concept within Project Teams. The Design Society ICED 13 , Seoul 2013-08-19 - 2013-08-22
  • Academic lecture
    Ingvaldsen, Jonas A; Holtskog, Halvor; Ringen, Geir. (2013) The Ambivalence of Super­visors in Industry Revisited: Bosses or Primus Inter Pares?. IWOT INTERNATIONAL WORKSHOP ON TEAMWORKING 17 , Leiden 2013-09-12 - 2013-09-13

2012

  • Popular scientific lecture
    Aschehoug, Silje Helene; Ringen, Geir; Schulte, Kjersti Øverbø. (2012) Lean produktutvikling i Tine. Tine FoU Miniseminar , Oslo 2012-11-23 - 2012-11-23
  • Academic lecture
    Welo, Torgeir; Ringen, Geir. (2012) NPD Practices in the Norwegian Manufacturing Industry: Assessing the Relationship between Key Dimensions and Performance. The International Society for Professional Innovation Manage 5th ISPIM Innovation Symposium - Stimulating Innovation: Challenges for Management, Science & Technology , Seoul 2012-12-09 - 2012-12-12

2011

  • Academic lecture
    Lodgaard, Eirin Anita; Pellegård, Øystein; Ringen, Geir; Klokkehaug, Jon Andreas. (2011) Failure Mode and Effects Analysis in Combination with the Problem-Solving A3. International Conference on Engineering Design, ICED11 , København 2011-08-15 - 2011-08-18

2009

  • Academic lecture
    Ringen, Geir; Lodgaard, Eirin Anita; Langeland, Camilla. (2009) Continuous Improvement in a Product Development Environment. Chalmers University of Technology 2nd Nordic Conference on Product Lifecycle Management , Gøteborg 2009-01-28 - 2009-01-29

NTNU – Norwegian University of Science and Technology

  • For employees
  • |
  • For students
  • |
  • Intranet
  • |
  • Blackboard

Studies

  • Master's programmes in English
  • For exchange students
  • PhD opportunities
  • Courses
  • Career development
  • Continuing education
  • Application process

News

  • NTNU News
  • Vacancies

About NTNU

  • About the university
  • Libraries
  • NTNU's strategy
  • Research excellence
  • Strategic research areas
  • Organizational chart

Contact

  • Contact NTNU
  • Employees
  • Find experts
  • Press contacts
  • Researcher support
  • Maps

NTNU in three cities

  • NTNU in Gjøvik
  • NTNU in Trondheim
  • NTNU in Ålesund

About this website

  • Use of cookies
  • Accessibility statement
  • Privacy policy
  • Editorial responsibility
Facebook Instagram Linkedin Snapchat Tiktok Youtube
Sign In
NTNU logo