Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Att systematisera objektspecifik osäkerhet i EVA-kalkyler: diskussion och exempel
Swedish National Road and Transport Research Institute.
2007 (Swedish)Report (Other academic)Alternative title
Investigating object specific uncertainty in cost-benefin studies for road infrastructure projects : discussion and examples (English)
Abstract [sv]

The Swedish Road Administration (SRA) performs cost-benefit studies for road infrastructure projects utilizing a specialized computer program known by its Swedish acronym EVA. This report describes three possible approaches to accomplish sensitivity studies of the SRA's costbenefit studies. A simple example explains how these approaches are applied in the context of the SRA's cost-benefit studies. First, the popular one-factor-at-a-time method is described. The major drawback of this approach is that interaction of factors cannot be addressed. The method of Monte Carlo simulation allows for this possibility. This method uses brute force computational power to calculate a large number of outcomes based on randomly altered values for the included factors. However, Monte Carlo simulation necessitates the assessment of the multivariate stochastic distribution of considered factors. It is generally very difficult to assess multivariate distributions and it is consequently difficult to utilize the full potential of the Monte Carlo technique. We suggest therefore that the SRA's sensitivity studies are based on few simulation runs where the factors are altered simultaneously in each run. The number of runs is kept low by appropriate selection of factor combinations in each run, utilizing statistical design theory for experiments. The so obtained "observations" are used to estimate a response surface, which is essentially a simplified regression relationship between the factors that matter in the context and the resulting ratio between a project's net present value and its cost. This method handles possible interaction between factors, requires from the investigator merely the determination of reasonable upper and lower bounds for included factors, and does not require a large number of simulation runs.

Place, publisher, year, edition, pages
Linköping: VTI., VTI rapport 591 , 2007. , 70 p.
Series
VTI rapport, ISSN 0347-6030
Keyword [en]
Cost benefit analysis, Sensitivity, Analysis, Method, Calculation, Simulation, Program, Statistical design, Variability, Case study
Research subject
Road: Traffic engineering, Road: Traffic theory; Road: General works, surveys, comprehensive works, Road: Economics
Identifiers
URN: urn:nbn:se:vti:diva-6470OAI: oai:DiVA.org:vti-6470DiVA: diva2:675349
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2013-12-03

Open Access in DiVA

fulltext(842 kB)208 downloads
File information
File name FULLTEXT01.pdfFile size 842 kBChecksum SHA-512
48a840ef61a731c3ddc8cfad1d9309c685ae41dab4258d31f332981df65f8c5f9b81b846c4b2cbc7f7f66edb0bf07f546ec61c13d024dc6b7552304da7d5f9e9
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Thomas, Fridtjof
By organisation
Swedish National Road and Transport Research Institute

Search outside of DiVA

GoogleGoogle Scholar
Total: 208 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 30 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf