The census method is also called complete enumeration method. In
this method, information is collected from each and every individual in the
Census of India is one of the best example. It is carried out
once in every ten years. An enquiry is carried out, covering each and every
house in India. It focuses on demographic details. They are collected and
published by the Register general of India.
The complete enumeration method is preferable provided the
population is small and not scattered. Otherwise, it will have the following
It is more time consuming, expensive and requires more skilled
and trained investigators.
More errors creep in due to the volume of work.
Complete enumeration cannot be used if the units in the
population destructive in nature. For example, blood testing, testing whether
the rice is cooked or not in a kitchen,
Testing the life times of bulbs etc.,
When area of the survey is very large and there is less
knowledge about the population, this method is not practicable. For example the
tiger population in India, number trees in a forest cannot be enumerated using