Lauren developed a detailed appraisal manual for TDF staff. She prepared financial appraisals of roughly 10 water and sanitation sector projects in small towns. To help build TDF’s capacity to conduct appraisals, she developed a model that analyzes the financial viability of the projects given different tariff scenarios. The model also determines the minimum average tariff and block tariff structure required for financial viability and includes various sensitivity analyses to show how the minimum required tariff changes under different cash flow and financing scenarios.