Deborah prepared the affordability and willingness to pay components of the assignment. She helped develop the survey which used the contingent valuation stated preference method. She analysed the results of the survey and reported the findings in the final report. For the affordability section of the study, Deborah calculated the maximum threshold of affordability by various sub groups such as the poor and non-poor. This was conducted using estimated 2012 household expenditures, average water consumption.  The results were also projected to 2030, adjusted by % GDP growth, and price elasticity of demand for water.  The results will enable the government of Armenia to introduce appropriate mitigation measures if water tariffs (prices) are above the affordability threshold. Finally, Deborah also assisted in building parts of the tariff model. She built a segment of the model which enables the user to determine each tariff block necessary to cover sector costs by customer class. 