Based on these studies MDRA has identified homogenous political clusters in the three states where assembly elections are being held simultaneously with Lok Sabha. In addition a detailed analysis of these clusters has helped to identify electoral battlegrounds where the contest is so close that even a small shift could throw up vastly different result. The sampling design is based on such unique political clusters. The survey was carried out in 84 assembly constituencies (36 in Andhra Pradesh, 28 in Karnataka and 20 in Orissa). In all 6251 voters were personally interviewed at their residence. The survey covered 252 villages and 84 urban centres spread. The fieldwork for the survey was conducted between March 26-April 1, 2004.