Weighting of toilet assessment scheme in China implementing analytic hierarchy process

Abstract

Advancing toilet technologies to address public health and sanitation issues are a concern of governments and organizations. This article mainly studies the assessment methods for the public toilets and some rural toilets considering from design to demolition to assist for the innovation of toilet technologies. The Analytic Hierarchy Process (AHP) and Life Cycle Assessment (LCA) methods were adopted to identify the assessment indicators and rank the weight. The outcome of Toilet Assessment Scheme (TAS), which includes a set of weightings and a classification system for the selected assessment indicators and sub-indicators. The weight calculation result showed that water resources, ecology, and indoor environmental quality are relatively high, which indicates that saving water, protecting the environment and optimizing the toilet environment should be given priority at the current stage. The individual questionnaire experts from the perspective of gender, profession, and generation, have different emphases on the evaluation scheme. This study can improve the comprehensiveness of toilet evaluation under the distinct background conditions, and will play a relevant role in the promotion of new toilet technology. The TAS can accelerate the toilet revolution in areas where toilets are scarce, and thus will improve the sanitary and health conditions of these populations.