between the NEWgenerator and the Reclaimer. The specific combinations of an implementation context's contextual parameters and constraints that lead to one CRT outperforming competing technologies can be described as the CRT's opportunity space 34 (Figure ). If a CRT meets the constraints of the community, labor wages dictate which CRT is the most affordable alternative (Figure ). The NEWgenerator requires higher labor hours than the Reclaimer and is only more affordable than the Reclaimer when labor wages are less than 23 USD•hour -1 . Of the 77 evaluated countries, 11 countries have hourly wages above this threshold and are locations where the Reclaimer outperforms the NEWgenerator in terms of daily per capita cost. Within each system, selection of photovoltaic vs. grid electricity is determined by the location's grid electricity price (Figure ) and the price level ratio (Figure ). Photovoltaic electricity generation becomes the more affordable alternative when electricity prices are high (above 0.16 USD•kWh -1 for the NEWgenerator and above 0.20 USD•kWh -1 for the Reclaimer) or when the price level ratio (capital expenses) is low (below 0.840 for the NEWgenerator and below 0.611 for the Reclaimer). The NEWgenerator and the Reclaimer can also be the leading CRT in contexts that do not necessarily lead to the lowest cost or emissions. For example, the NEWgenerator has the potential to recover biogas energy to offset LPG requirements for sludge pasteurization and water to be used as flush water. Systems with the capability to recover water and/or energy may be especially beneficial in contexts facing water shortages or with high LPG prices, even if the system itself is not as affordable as other alternatives. Although the NEWgenerator outperforms the Reclaimer in many contexts in terms of daily per capita cost and annual CI scores, context-specific analyses show there are conditions in which the Reclaimer can outperform the NEWgenerator and should be explored before selection of one alternative over another for implementation.