Jingyi AHP

National Communicable Disease Quarantine Centre Land Suitability Analysis

OBJECTIVE

PROXIMITY

CRITERION

AHP

LAND SUITABILITY

Overview of Analytical Hierarchical Process (AHP)

To have a more comprehensive and accurate identification and analysis of the most suitable site for construction of the quarantine centre, a multi-attribute decision analysis (AHP) is employed to derive the weights associated with the following criteria map layers.

• Economic Factor
• Accessibility Factor
• Healthrisk Factor
• Natural Conservation Factor

Analytical Hierarchical Process (AHP) Pairwise Comparison Matrix & Results

As seen in the AHP above, the result show that the factor that are of the most importance would be health risk factor with a weight of 58.4%. Next factor will be the accessibility factor with a weight of 26.3% and then natural conservation factor and economic factor with a weight of 10.1% and 5.2% respectively.

The consistency ratio (CI/RI) is also below 0.1, which indicates that the AHP analysis above do not need to be re-evaluated and is at an acceptable range of 0.087 (≈ 9%).

The weights obtained above will be used to combine all 4 factor layers to determine the best site to construct the quarantine centre.

AHP Process

Before doing AHP, I first came up with the priority order of the 4 factors as shown below:

1. Healthrisk Factor
2. Accessibility Factor
3. Natural Conservation Factor
4. Economic Factor

With 1 being the most prioritized factor and 4 being the least prioritized factor

Then, I used a scale for the pairwise comparison conducted above as shown below.

Additional Notes

Limitations of AHP
In AHP, using pairwise comparison may not be accurate as in certain case, a low score on one criterion can be compensated by a high score on another.