Economic Assessment of Sanitation Interventions in Vietnam - WSP
Economic Assessment of Sanitation Interventions in Vietnam - WSP
Economic Assessment of Sanitation Interventions in Vietnam - WSP
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III.Study MethodsThe study methodology <strong>in</strong> <strong>Vietnam</strong> follows a standard methodologydeveloped at regional level reflect<strong>in</strong>g establishedcost-benefit techniques (Hutton et al, 2012), which havebeen adapted to sanitation <strong>in</strong>terventions and the <strong>Vietnam</strong>field study based on specific research needs and opportunities.As shown <strong>in</strong> Figure 3, the study consists <strong>of</strong> a field componentthat leads to quantitative cost-benefit estimates and<strong>in</strong>-depth study <strong>of</strong> qualitative aspects <strong>of</strong> sanitation. Two types<strong>of</strong> field-level cost-benefit performance are presented: Output1 reflects ideal performance assum<strong>in</strong>g the <strong>in</strong>tervention isdelivered, ma<strong>in</strong>ta<strong>in</strong>ed and used appropriately, and Output 2reflects actual performance based on observed levels <strong>of</strong> <strong>in</strong>terventioneffectiveness <strong>in</strong> the field sites. However, both theseanalyses are partial, given that <strong>in</strong>tangible benefits <strong>of</strong> sanitationimprovements and other benefits that may accrue outside theCHAPTER 4sanitation improvement site are excluded. Hence Output 3,overall cost-benefit assessment, takes these <strong>in</strong>to account.3.1 TECHNICAL SANITATION INTERVENTIONSEVALUATEDThe sanitation component to be emphasized <strong>in</strong> the regionalcomponent <strong>of</strong> the study is human excreta. <strong>Interventions</strong> toimprove human excreta management will focus on bothon-site and <strong>of</strong>f-site sanitation options; <strong>in</strong>deed one <strong>of</strong> thekey aims <strong>of</strong> this study is to compare the relative efficiency <strong>of</strong>these from the perspective <strong>of</strong> different <strong>in</strong>dicators. Hygienerelatedpractices are also <strong>in</strong>cluded. In <strong>Vietnam</strong>, accord<strong>in</strong>gto the TOR <strong>of</strong> the study, the scope <strong>of</strong> sanitation is broaderthan <strong>in</strong> other countries where ESI was conducted (see Table2), and <strong>in</strong>cludes:FIGURE 3: FLOW OF DATA COLLECTED (INPUTS) AND EVENTUAL COST-BENEFIT ASSESSMENTS (OUTPUTS)Input 1:CHAPTER 6Input 2:Field-LevelMonetary BenefitEstimatesField-LevelMonetary CostEstimatesCHAPTER 8Output 1:CHAPTER 7Input 4:Ideal Cost-BenefitField PerformanceField-Level ProgramApproach AnalysisCHAPTER 8ActualOutput 2: Cost-BenefitField PerformanceCHAPTER 4Input 3:CHAPTER 5Intangible(Non-Monetized)Field-Level BenefitsCHAPTER 8Output 3:OverallCost-Benefit<strong>Assessment</strong>Input 5:National-LevelBenefits8<strong>Economic</strong> <strong>Assessment</strong> <strong>of</strong> <strong>Sanitation</strong> <strong>Interventions</strong>