98
T. Gichamo et al.
Table 11.4
The positive
( f ∗
i ) and the negative ideal points
( f
−
i ) of the alternatives based on each criterion
Alternatives/criteria
Pollutants
removal
efficiency
Land
requirement
Capital
cost
Maintenance
cost
Health risk
Hydrogeological risk
Ecological
benefit
Subjected to
seasonal
effects
f ∗
i
9
5
4
2
2
2
8
8
f
−
i
5
9
6
6
7
7
4
3
T. Gichamo et al.
Table 11.4
The positive
( f ∗
i ) and the negative ideal points
( f
−
i ) of the alternatives based on each criterion
Alternatives/criteria
Pollutants
removal
efficiency
Land
requirement
Capital
cost
Maintenance
cost
Health risk
Hydrogeological risk
Ecological
benefit
Subjected to
seasonal
effects
f ∗
i
9
5
4
2
2
2
8
8
f
−
i
5
9
6
6
7
7
4
3