The impact stage of the LOGIC model corresponds to improvements expected over how many years?

• A. 1-3 years
• B. 4-6 years
• C. 10 years
• D. Immediate

Answer: (C)

In the LOGIC model, the impact stage represents the long-term, population‑level changes that result from a program’s activities. These are the ultimate outcomes you hope to achieve—sustained improvements in health, well‑being, or social conditions—rather than the immediate outputs or short‑term changes you see right away. Because these effects reflect broad, sustained change across communities and systems, they take a substantial amount of time to become evident. In most health program contexts, that horizon is about ten years, capturing the extended period needed for large-scale benefits to emerge and be measurable. Shorter timeframes describe outputs and early outcomes, while the lengthy impact reflects the lasting, decades-long influence on health and quality of life.