Multi-Criteria Analysis
Via Decision Wizard
The MCE in its Weighted Linear Combination (WLC) method introduces a “fuzzy” concept of suitability in standardizing criteria. Instead of Boolean logic decision of assigning absolute suitability or unsuitability to a location for a given criteria, it is scaled to a particular common range where suitable and unsuitable areas are continuous measures. The Decision Wizard is a program in IDRISI that takes all constraints and factors together along with their characteristics, boundaries, and limits as well as the weight each one carries relative to each other.
Factor Standardizing Table
Factor |
Min |
Max |
Membership Function shape |
Membership Function Type |
Control Points |
Landfuzz |
|
|
|
|
|
Police Cost |
0 |
7.87462E6 |
Monotonically increasing |
Linear |
a = 334.00
b = 350.00 |
Slopes |
0 |
589.6980 |
Monotonically decreasing |
Sigmoidal |
c = 0.00
d =10.00 |
Intersection |
0 |
1.0000 |
Monotonically decreasing |
Linear |
c = 0.58
d = 1.00 |
The MCE is implemented using the Experts Systems Modelling approach of Analytical Hierarchy Process (AHP). The AHP orders factors into a hierarchy of importance. Criteria can trade off with each other depending on the importance weights assigned to them. In the procedure for Multi-Criteria Evaluation using WLC, it is necessary that the weights sum to one. In AHP, these weights are calculated by taking the principal eigenvector of a square reciprocal matrix of pairwise comparison between the criteria. All possible pairs of criteria are compared on a 9- point continuous scale for their relative importance in determining the suitability.
The Eigenvector of weights is :
landfuzz : 0.1163
slopefuzz : 0.0499
interfuzz : 0.1108
policefuzz : 0.7230
Consistency ratio = 0.05
Consistency is acceptable.
Location |
Road |
Boundaries |
Burnaby |
Barnet Hwy |
From Velodrome Rd to Nichols Dr |
Burnaby |
Kensington Ave |
From Hwy 1 to Lougheed Hwy |
Burnaby |
Marine Dr |
From Byrne Rd to N Fraser Way |
Richmond |
Hwy 91 |
Eastbound from Shell Rd till past the S-curve |
Richmond |
Hwy 99 |
Eastbound just off Oak Bridge to Westminster Hwy |
Richmond |
No. 6 Rd |
Between Cambie Rd and Triangle Rd |
Richmond |
Blundell Rd |
Between No. 6 Rd and Sideway Rd |
Richmond |
Shell Rd |
Between Westminster Hwy to Bridgeport Rd |
Richmond |
Grant McConachie Way |
From Templeton St. to across the Arthur Laing Bridge |
Richmond |
Knight St |
From Westminster Hwy to Bridgeport Rd |
Richmond |
No. 5 Rd |
From Granville St to Bridgeport Rd |
Richmond |
Westminster Hwy |
Between Shell Rd to Nelson Rd |
Vancouver |
W 10th Ave |
From Blanca St to Highbury St |
Vancouver |
W 4th Ave |
From Drummond Dr to NW Marine Dr |
Vancouver- Burnaby |
SW Marine – Marine Dr |
Between Victoria Dr to Nelson Ave |
AHP Table - Weights given to the factors for street racing.
In the AHP table, the most important factor was the police stations where the minimum distance away from the street race must be met. During a street race, law does not apply, meaning any presence of the law would mean that the race is comprised. That is why to those racers, the excitement and adrenaline rush of not knowing what the outcome would be is so important. (Peak & Glensor, 2004)
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