Rethinking Brownfield Redevelopment features: Fuzzy Delphi Method Brano Glumac

Intro Two basic ways to extract the data Database collected from final users Database collected from experts PAGE

Method Delphi Method helps the group thinking process From (Dalkey and Helmer, 1963) Procedure: Brainstorming, Narrowing Down, Ranking PAGE

Research task What are the most important features for Brownfield Redevelopment? Features Brownfield (Alker, 2000) PAGE

Fuzzy Delphi What is it? Derived from the traditional Delphi technique and Fuzzy Set theory (Murray, Pipino, and Gigch 1985) Fuzziness lack of definite or sharp distinctions Benefits Incorporate uncertainty due to human factor Less questionnaires PAGE

PHASE 1 Brain - storming experts as individuals not panelists features from the literature remove duplicates and unify terminology Questionnaire 1: Send consolidate list to experts for validationQuestionnaire 1 refine final version PHASE 2 Ranking Questionnaire 2: Experts rate featuresQuestionnaire 2 calculate with Fuzzy Delphi Method final result is list of important features Fuzzy Delphi Procedure

Fuzzy Delphi Calculation Steps Steps: 1.Validate features 2.Collect evaluation score for each feature 3.Set-up fuzzy number (Klir and Yuan, 1995) 4.Defuzzification S 5.Setting a threshold α PAGE

Survey Results AspectCode - Feature W = (a,b,c,d) SRank abcd PlaceA1 - Proximity 1,006,948,0910,06,516 A2 - Accessibility 1,006,978,0010,06,497 A3 - Usage 1,006,127,2910,06,1013 A4 - Embedded into the urban fabric 2,006,897,8910,06,693 A5 - Contamination level 1,006,557,5210,06,2711 A6 - Skyline 1,004,035,5310,05,1421 A7 - Land Relief 1,003,344,4610,04,7022 A8 - Soil properties 1,004,895,9710,05,4620 A9 - Flora & Fauna 1,005,516,5110,05,7619 A10 - Heritage 1,006,507,5010,06,2512 A11 - Archeological site 1,005,837,0010,05,9618 A12 - Existing neighborhood image 1,005,917,0310,05,9917 LegalA13 - Ownership 1,006,737,8510,06,399 A14 - Administrative support 4,007,548,6310,07,542 A15 - Approval process 1,006,827,9710,06,458 A16 - Support of local residents/users 1,006,697,8010,06,3710 A17 - Support of surrounding residents/users 2,006,777,7410,06,634 FinanceA18 - Governmental incentives 1,006,037,2910,06,0814 A19 - Potential for different land-use 3,008,299,1710,07,611 A20 - Value capturing 1,006,037,1710,06,0515 A21 - Liquidation option 1,006,117,0010,06,0316 A22 - Current Real Estate Value 2,006,577,6010,06,545

Survey Results Overall Rating 1 - A19 - Potential for different land-use - 7, A14 - Administrative support - 7,54 Ratings of Independent developers 1 - A14 - Administrative support - 8, A4 - Embedded into the urban fabric - 8, A2 - Accessibility - 7, A19 - Potential for different land-use - 7, A17 - Support of surrounding users - 7, A12 - Existing neighborhood image - 7, A15 - Approval process - 7,16 Rating Of Contractors 1 - A19 - Potential for different land-use - 7, A14 - Administrative support - 7, A10 - Heritage - 7, A13 - Ownership - 7,17 Rating of Governmental Agencies 1 - A19 - Potential for different land-use - 7, A14 - Administrative support - 7, A2 - Accessibility - 7, A10 - Heritage - 7, A16 - Support of local users - 7,00

Discussion The selection procedure and importance of the Brownfield redevelopment features Different priorities for different expert groups