Source: https://tendernation.io/opportunities/01a13c3b-e895-7047-b106-0e78cf1b6607/optimism-bias-developing-the-evidence-base [Skip to main content](#main-content) awardedGBdirect award procedure # Optimism Bias - Developing the Evidence Base [The Department for Transport](https://tendernation.io/buyers/the-department-for-transport) Estimated value £64,000 Published 22 Mar 2019 Deadline Closed 20 Mar 2018 ## Who can bid - Small contract value Valued under £135,018 including VAT, the lowest Procurement Act threshold for goods and services. ## About this tender The aim of this research is to update the evidence base for the Optimism Guidance in WebTAG. The current guidance has come under scrutiny for being outdated as it fails to capture specific characteristics, complexities, and risk profiles of schemes as well as depending on datasets from 2002. This research project will acquire current cost datasets from various departments and organisations in order to update Optimism Bias uplift values. ## CPV classification Transport systems consultancy services Source Contracts Finder (UK) [View official notice ](https://www.contractsfinder.service.gov.uk/notice/5a0d5280-30e3-4a6b-9bcd-a9f91139d430) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. [Track tenders free ](/register) [Buyer profileThe Department for Transport: past awards and live tenders](https://tendernation.io/buyers/the-department-for-transport)[SectorMore Architecture, engineering & surveying tenders](https://tendernation.io/sectors/architecture-engineering-surveying) ## More tenders like this [Vacuum Pump Tritium Testing UK Atomic Energy Authority 31 days left 16 Nov 2026](https://tendernation.io/opportunities/01a1464c-dd0c-72ed-b7bd-bac1e52155ab/vacuum-pump-tritium-testing)[Mechanical and Electrical Consultant Tender University Hospitals of North Midlands NHS Trust 38 days left 23 Nov 2026](https://tendernation.io/opportunities/01a145df-0fba-7085-98fc-1c9389531130/mechanical-and-electrical-consultant-tender)[Asbestos Surveys Northamptonshire Partnership Homes 28 days left 13 Nov 2026](https://tendernation.io/opportunities/01a14571-3963-732e-a081-bef649a3206b/asbestos-surveys)[Design Lead for Christchurch Learning Centre School Satellite Bournemouth, Christchurch and Poole Council 32 days left 17 Nov 2026](https://tendernation.io/opportunities/01a14503-59e7-72ad-900a-82eaae1a3048/design-lead-for-christchurch-learning-centre-school-satellite)[Design Lead for Christchurch Learning Centre School Satellite Bournemouth Christchurch and Poole Council 32 days left 17 Nov 2026](https://tendernation.io/opportunities/01a1449a-1757-7140-969b-41572282e4c3/design-lead-for-christchurch-learning-centre-school-satellite)[Penistone Station - Independent Assessor Barnsley Metropolitan Borough Council 27 days left 12 Nov 2026](https://tendernation.io/opportunities/01a14495-7973-71c1-9c37-1ba8178069cf/penistone-station-independent-assessor)