This document includes the background, explanation, methodology and tools for implementation of the Market Driven Approach for Selection of Faecal Sludge Treatment Products. This method was developed to help fill a great need for practical and reliable approaches that allow engineers to select and design treatment technologies for centralized to semi-centralized treatment of faecal sludge. In the absence of clear legal frameworks for faecal sludge treatment products, identifying the greatest market attractiveness provides a method to help select products of treatment. Once treatment products are identified, then treatment performance goals can be defined for the required level of treatment for safe enduse to ensure protection of public and environmental health. In addition to the greatest potential to generate revenue, this can help ensure the design of adequate treatment, and also operation as plant managers have to meet customer demand. However, this is not a stand-alone approach, it needs to be incorporated into an integrated planning approach to faecal sludge management (www.sandec.ch/fsm_tools, www.sandec.ch/fsm_book).