Node 1. The determination of which survey village to visit first will depend on how the survey team plans and organises their movement through the whole study area/cluster. It will also be impacted on by where the survey team decides to base themselves within the study area/cluster.

Node 2. This step is important as this ensures smooth entry and implementation of the survey in the village. Survey Manager should ensure that we are able to obtain appropriate letters from the FMoH and/or the SMoH (it would be ideal to have letters of endorsement from both entities) that authorises and endorses the survey. Enough copies of the letter/s should be provided to the survey teams such that they will be able to hand a copy to each of the village leaders. Team Leaders should ensure that they have copies of this letter every time their team heads out to conduct survey.

Node 3 and Node 4. Once the village leader has given permission for the team to conduct the survey, ask the village leader about the total population of the village and the spatial organisation or structure of the village. The total population of the village should be in terms of persons. If the village leader reports total number of households, ask again in terms of number of persons. If this is unknown, then we estimate the total population of the village by multiplying the total number of households with the average household size in Sudan. The Sudan Population and Housing Census of 2008 estimate the average household size in Sudan as seven1. The following equation can be used for estimating the total village population if only total households is known:

$$\text {Total village population} = \text {Total households in village} \times \text {average household size}$$

$$\text {Total village population} = \text {Total households in village} \times 7 \text { members per household}$$

The total village population should be recorded. There is an item in the data collection forms in which to enter this information. This information is needed in performing a posteriorly weighted calculation of indicator estimates for each study area/cluster.

It would also be important to ask the village leader of the spatial structure/organisation of the village. This information will help the survey team in planning and organising its data collection in the village.

Node 5. Based on the plans made by the survey team, data collection should be started. It is important to remember that we will be doing a full enumeration of children age 6-59 months old and their mothers and all pregnant and lactating women (PLW) in the village. Hence, the survey in the village is deemed completed if all or nearly all of eligible children and PLW have been surveyed.

Node 6. In the occasion that the village leader doesn’t allow for the survey to be conducted in the village, an alternative sampling village should be visited. Ideally, during stage 1 selection, an alternative sampling village should already be selected for each segment. This alternative sampling village should then be visited as a replacement for the previous village selected. The Survey Manager should decide and organise how best to address for this contingency.

###### Endnotes

1 United Nations Population Fund, 2008. Population Dynamics of Sudan, United Nations Population Fund.