Torleif Halkjelsvik
Adjunct Chief Research Scientist
- Department
- IT Management (M)
- Organisation
- Simula Metropolitan
- torleif@simula.no
Publications
2022
Journal Articles
T. Halkjelsvik and M. Jørgensen
When 2 + 2 should be 5: The summation fallacy in time prediction
Journal of Behavioral Decision Making
M. Jørgensen, T. Halkjelsvik and K. Liestøl
When should we (not) use the mean magnitude of relative error (MMRE) as an error measure in software development effort estimation?
Information and Software Technology
2021
Journal Articles
M. Jørgensen, M. Welde and T. Halkjelsvik
Evaluation of Probabilistic Project Cost Estimates
IEEE Transactions on Engineering Management
2020
Journal Articles
M. Jørgensen and T. Halkjelsvik
Sequence effects in the estimation of software development effort
Journal of Systems and Software
2019
Technical reports
M. Welde, M. Jørgensen, P. F. Larssen and T. Halkjelsvik
Estimering av kostnader i store statlige prosjekter: Hvor gode er estimatene og usikkerhetsanalysene i KS2-rapportene?
Concept-rapport nr. 59
2018
Books
T. Halkjelsvik and M. Jørgensen
Time predictions: Understanding and avoiding unrealism in project planning and everyday life
Simula SpringerBriefs on Computing
2014
Posters
E. Løhre and T. Halkjelsvik
Time Perception Can Influence Performance Time Predictions
2012
Journal Articles
M. Jørgensen, T. Halkjelsvik and B. Kitchenham
How Does Project Size Affect Cost Estimation Error? Statistical Artifacts and Methodological Challenges
International Journal of Project Management
T. Halkjelsvik and M. Jørgensen
From Origami to Software Development: a Review of Studies on Judgment-Based Predictions of Performance Time
Psychological Bulletin
2011
Journal Articles
T. Halkjelsvik, M. Jørgensen and K. Teigen
To Read Two Pages, I Need 5 Minutes, But Give Me 5 Minutes and I Will Read Four: How to Change Productivity Estimates by Inverting the Question
Applied Cognitive Psychology
2010
Journal Articles
M. Jørgensen and T. Halkjelsvik
The Effects of Request Formats on Judgment-Based Effort Estimation
Journal of Systems and Software