SAMPLING FRAME FOR FIRST STAGE UNIT:
The sampling frame for urban sector is the list of Urban Frame Survey (UFS) blocks as per latest Urban Frame Survey and for rural sector, it is the list of villages as per Census 2011 updated by removing those villages which are urbanized and included in latest UFS (till the time of sample selection). Sometimes, with a view to ensuring uniformity in the size of FSUs and operational convenience, large villages/UFS blocks are notionally divided into smaller units of more or less equal size, known as sub-units depending on a pre-defined criteria based on population in the village or number of households in the UFS block. The sector-specific criteria for sub-unit formation are as below :
Rural Sector
(i) The number of SUs to be formed in the villages (with Census 2011 population of 1000 or more and except some States/UTs) is decided based on projected present population of the village. The criteria for the formation of the SUs are given below:
Projected Population of the village Number of SUs to be formed
less than 1200 1
1200 to 2399 2
2400 to 3599 3
... ...
(ii) For rural areas of Himachal Pradesh, Sikkim, Andaman & Nicobar Islands, Ladakh, parts of Uttarakhand (except four districts Dehradun, Nainital, Haridwar and Udham Singh Nagar), Jammu and Kashmir (seven districts Poonch, Rajouri, Udhampur, Reasi, Doda, Kishtwar, Ramban) and Idukki district of Kerala; SU is formed in a village if population as per Census 2011 is more than or equals to 500. The criteria for the number of SUs to be formed are as below:
Projected Population of the village Number of SUs to be formed
less than 600 1
600 to 1199 2
1200 to 1799 3
... ...
Urban Sector:
Sub-units are formed in the UFS blocks with number of households 250 or more. The number of SUs to be formed within the UFS blocks is decided by the following criteria:
Number of Households in UFS Block Number of SUs to be formed
less than 250 1
250 to 499 2
500 to 749 3
... ...
Thus, the list of villages / UFS blocks / SUs (for those villages or UFS blocks where sub-units are formed) together constitute the sampling frame for selection of the First Stage Units.
