Strategic Action Plan - International Environmental Technology Centre

Strategic Action Plan Report
to change the weights or scores for some of the criteria or technology options, then the ranking of
the technologies can change accordingly. During the group discussion therefore, it is essential to
try various iterations to check the sensitivity of the matrix to such changes. This can actually
provide important insights as to how different criteria contribute in the final decision and thus help
the group in making a rational and robust decision.
For conducting such sensitivity analysis, it is possible to develop a simple spreadsheet model, and try
out various weights and scores to see how they influence the final scores and thus, the decisions.
5.3 Star diagram for presentation of outcomes
Another limitation of weighted sum matrix is that at the end of the process, users get an aggregated
score for each technology option and it is not possible to see as to which were the dominating criteria
amongst all. To overcome such a situation, it is recommended that the total scores for each of the
technology options be represented by a star diagram as shown below (Figure 2):
Figure 2: Star Diagram for the Presentation of Outcomes
Such a diagram can illustrate the influence of various factors in the final scores. In some cases, for
instance, the total score earned by a technology system may be the highest, but this could be due to
the contribution of non-priority criteria. This will require revisiting the weights and scores to ensure
that the total scores are in accordance with the priorities defined by the stakeholder groups, and thus
lead to a more rational and acceptable decision.
It is also possible to prepare individual star diagrams for each of the broad category (or group
heading as in tables below) showing the significant variables within that category. Thus, one can
prepare star diagrams for technical suitability, health, safety and risk issues, or resources and
emissions, etc.
ISWM Plan for Pune
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