Set-Based Design: A Method for Improving Requirement Definition in the Bridge Procurement Process: How Set-Based Design Can Manage Uncertainty in the Preliminary Design Phase and Procurement of Frame Bridges
Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Program
Structural engineering and building technology (MPSEB), MSc
Publicerad
2024
Författare
Hansson, Lucas
Tacking, Neo
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
The Swedish Transport Administration (STA) has committed to achieving climateneutral
infrastructure by 2040, necessitating sustainable decisions early in public
infrastructure projects. To strengthen decision-making in the preliminary design
phase, managing uncertainty is crucial, and one approach is to implement Set-Based
Design (SBD). This thesis investigates the application of SBD in the early stages
of bridge design to address uncertainties and improve requirement-setting in procurement.
A Python script was created to define the design space of bridge designs,
which were presented as normal distributions of key variables: Material Cost,
CO2-eq emissions, and buildability. Interviews were conducted to identify how the
information gathered by SBD can be used in decision-making during preliminary
design and public procurement. Findings indicate that the normal distributions
can help decision-makers early in infrastructure projects, particularly in public procurement.
By providing distributions of key variables, SBD can assist the STA to
include award criteria based on both emissions and price, rather than solely on price.
The research highlights the potential of SBD to generate absolute threshold values
in non-mandatory requirements and added values for evaluation criteria in tender
documents to consider tenders’ emissions in tender evaluation. The study’s findings
suggest that adopting SBD can lead to significant improvements in managing uncertainty,
supporting better decision-making, and advancing sustainable infrastructure
development.
Beskrivning
Ämne/nyckelord
Set-Based Design, Infrastructure Projects, Bridge Design, Uncertainty Management, Sustainable Development, Public Procurement, Quality Procurement, Added-Value, Tender Evaluation