1. Small area (i.e. a service delivery unit or smaller) or wide area (i.e. multiple service delivery units)
   1. Small area
      1. Overall coverage figure is key information requirement or in depth information on factors to coverage required?
         1. In depth information on factors more important
            1. SQUEAC
            2. 1, Overall coverage estimate
            3. 2. Coverage mapping through risk mapping
            4. 3. Concept map of barriers and boosters to coverage
         2. Overall coverage figure is key
            1. Classify or estimate coverage?
            2. Estimate
            3. CSAS
            4. Classify
            5. SLEAC
            6. Routine/frequent surveys or one off, end-of-project or end-term survey?
            7. Routine
            8. SLEAC
            9. End-of-project / end-of-term
            10. CSAS
            11. 1. Overall coverage estimate
            12. 2. Coverage mapping
            13. 3. Ranked list of barriers
            14. Detailed maps available?
            15. Yes
            16. CSAS
            17. No
            18. SLEAC
            19. Classification of coverage
            20. Ranked list of barriers
            21. Quick?
            22. Yes
            23. SLEAC
            24. No
            25. CSAS
   2. Wide area
      1. Estimation or Classification at level of service delivery unit?
         1. Estimation
            1. Experienced with CSAS?
            2. Yes
            3. Happy with CSAS?
            4. Yes
            5. CSAS
            6. No
            7. S3M
            8. 1. Overall coverage estimate
            9. 2. Coverage mapping
            10. 3. Ranked list of barriers and boosters
         2. Classification
            1. SLEAC
            2. 1. Overall coverage estimate
            3. 2. Coverage mapping by service delivery units
            4. 3. Ranked list of barriers