Blackburn Wastewater Treatment Plant Upgrade Study

Section 5.0 -Evaluation of Options
Subsequent to the ranking results developed in Form 5.3, the participants
completed Form 5.4, by using the pair-wise comparison technique, with the
scores modified by incorporating the weighting results &om Form 5.1. The
overall results were similar to the r;lting/weighting exercise as these results
indicated that the preferred options are Option 1 (score 46.9) and Option 2
(score 44.2), and the least preferred option is Option 7 (score 10.8).
The similarity in the results provides a level of confidence that the decision
techniques are robust. As Options 1 and 2 scored the highest in both
techniques, discussion at the workshop then concentrated on identifying the
preferred option for recommendation. As identified in the earlier sections both
options achieve similar objectives primarily through alternative flow transfer
routes. Consensus at the workshop was that the certainty of the route from
Option 1 was greater than that for Option 2, and the construction of the Option
1 alignment was likely to have more potential to encourage further
development.
The recommendation of the Decision Workshop members based on the ranking
and comparison results is therefore to pursue Option 1.