Impact evaluation is useful when:

Impact evaluation is useful when:

• A. The project is brand new.
• B. The project has unlimited resources.
• C. The project has no external factors.
• D. The project has been functioning long enough to have visible effects.

Answer: (D)

Impact evaluation measures the changes caused by a project by comparing outcomes to what would have happened otherwise. It’s most useful once the project has been operating long enough for effects to become visible and measurable. If the project is brand new, there hasn’t been time to generate detectable changes, so assessing impact isn't meaningful yet. Unlimited resources don’t create observable outcomes by themselves, and external factors can influence results but can be accounted for in the analysis; the key requirement is that there are measurable effects after some time. So, impact evaluation is most useful when the project has been functioning long enough to show visible effects.

Impact evaluation measures the changes caused by a project by comparing outcomes to what would have happened otherwise. It’s most useful once the project has been operating long enough for effects to become visible and measurable. If the project is brand new, there hasn’t been time to generate detectable changes, so assessing impact isn't meaningful yet. Unlimited resources don’t create observable outcomes by themselves, and external factors can influence results but can be accounted for in the analysis; the key requirement is that there are measurable effects after some time. So, impact evaluation is most useful when the project has been functioning long enough to show visible effects.