The SFD process can be used to produce an SFD for any urban area, which is of particular interest. For example, it may be useful to produce an SFD on a district within a city where it is understood that sanitation service delivery is relatively low, or for areas of a city where it is reported that a significant proportion of the population, often the most vulnerable, rely on unimproved services.
An SFD Report should always include a full description of the concerned urban area and full details of the qualitative and quantitative data collection methods used – as described in the SFD Manual. However, if any disaggregation of quantitative data into sub-groups is made, for example to produce two SFD Graphics representing a) the city as a whole, and b) those living in low-income areas, the SFD Report must also include both the method used and an estimation of the level of confidence in the data. A method for disaggregating quantitative data is not included within the SFD Manual, but is available at: http://documents.worldbank.org/curated/en/461321468338637425/Fecal-sludge-management-diagnostics-for-service-delivery-in-urban-areas-tools-and-guidelines.