Earlier prototypes inform the design of a (high-fidelity) pilot. The pilot phase of the solution allows us to conduct a full and robust longer-term test of the idea. We can collect robust and rigorous evidence for impact and outcomes, as well as viability and feasibility. Then, we can conduct an evaluation of the pilot to help us decide how to adopt the pilot and to bring it to scale. If there are significant issues with the solution, including funding/revenue-sustainability and political concerns, it would be cancelled or pivoted before making it to the pilot stage. Pilots that skip prototyping are prone to be dismissed altogether despite significant investments, or worse, renewed as perpetual zombies.