(i) The complete enumeration of the population requires lot of time, money, manpower and administrative personnel. As such this method can be adopted only by the government and big organizations that have vast resources at their disposal.

(ii) Since the entire population is to be enumerated, the census method is usually very time consuming. If the population is sufficiently large, then it is possible that the processing and the analysis of the data might take so much time that when the results are available, they are no’ of much use because of changed conditions.