Which evaluation type occurs during the implementation phase of a program?

The evaluation type that occurs during the implementation phase of a program is process evaluation. This type of evaluation focuses on the methods and procedures utilized during the implementation of the program, assessing whether the program is being delivered as intended. It monitors the fidelity, quality, and extent of the program's activities, ensuring that it adheres to the planned design and identifies any challenges faced during execution.

Process evaluation is essential because it provides real-time feedback to the program implementers, allowing for adjustments to be made to enhance effectiveness and improve outcomes. This type of evaluation not only evaluates the operational aspects but also helps to understand why certain results may be achieved or not, offering insights that can be crucial in enhancing future implementations or iterations of the program.

In contrast, impact evaluation typically occurs after implementation to measure the immediate effects of the program, while outcomes evaluation focuses on the longer-term changes resulting from the program. Summative evaluation is often associated with the overall assessment of a program's effectiveness after it has been completed. Thus, process evaluation is distinctively positioned within the implementation phase, making it the appropriate answer.