The light-rail transit line described in this chapter is being evaluated by another group of stakeholders. Using the revised information, determine the weighted score for each alternative and comment on your result.

Question

What will be an ideal response?

Answer 1

First, determine the relative weight. For a ranking of 1, the highest, assign n

where n is the number of objectives. In this case n = 5. Therefore, for a ranking of

2, the next highest, assign n – 1 = 5 – 1 = 4. This process is then continued for the

remainder of the objectives.

Next, determine the weighting factors using Equation 13.9.

The weighting factor for objective I is:

K1 = relative / sum of relative weights

K1 = [1 / (5 + 4 + 3 + 2 + 1)] × 100

K1 = (1 / 15) × 100

K1 = 6.667 = 7

Objective II

K2 = (3 / 15) × 100

K2 = 20

Objective III

K3 = (5 / 15) × 100

K3 = 33.333 = 33

Objective IV

K4 = (4 / 15) × 100

K4 = 26.667 = 27

Objective V

K5 = (2 / 15) × 100

K5 = 13.333 = 13



Next, use the estimated values for measures of effectiveness found in Table 13.5

to produce the point score for the candidate transit lines.



The ranking of alternatives in order of preference is II, I, IV, V, and III.

Alternatives I and II are clearly superior to the others.