Economic Effects of Sustainable Sanitation - SuSanA

Case Study Kampala
It has to be kept in mind that the effects cannot be compared to each other, since the input
parameters of the modifications are different.
System A
The largest effect in the analysis for system A was caused by the reduction of the transport
distance to 25 km. It resulted in an increase of the return on sales by 120.42% for the small
scale II and 91.24% for large scale scenario. The values can be explained by several factors:
Not only lower fuel consumption has to be mentioned, also less tanks trucks have to be
purchased and fewer salaries have to be paid to the truck staff. The extension of the project
lifetime resulted in an increase of 81.05% and 38.16% for the small scale II and the large
scale scenario, respectively, reflecting the influence of the depreciation of the investments.
The increase of the fuel price resulted in a reduction of the return on sales of 72.31% for the
small scale II- and 36.45% for the large scale scenario, which again can be explained by the
high proportion of transport costs in the balance of system A. Rising truck prices resulted in a
reduction of the return on sales of 50.32% and 21.47% and the increase of incentives created a
decreasing return on sales of 40.20% and 20.09% in the scenarios small scale II and large
scale, respectively. The reduction triggered by the increased incentives illustrates the
balancing act of finding the right level of incentives – the current level of incentives of 0.04
EUR was raised to still considerably low 0.05 EUR which already showed a significant
decrease in the return on sales. The effect of a supply chain failure with 19.32% and 9.72%
for the small scale II and large scale scenarios showed the smallest reduction in this
calculation.
In general the large scale scenario is less affected by the modifications as the small scale II
scenario. At the same time the return on sales for the large scale scenario is higher, which
leads to the conclusion that a larger scale, yielding higher return on sales, thus delivering
sustainable sanitation to more people positively influences the stability of the scenarios. Since
yielding negative balances, the small scale I scenarios were neglected. Table 7 shows the
effects of the modifications for system A.
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