1. Is it a useful idea? | Â |
 - How strong is the evidence? |  |
 - Will it help and be acceptable? |  |
2. Is it feasible? | Â |
 - How practical and realistic is it to implement? |  |
3. Can we assess the impact? | Â |
 - Will it be measurable through the methods proposed? |  |
 - Will additional measures be needed? |  |