Introduction or preface

Recently, as in the other sciences, also in Statistics quality is calling more attention. In this article the Authors consider the methodological peculiarities of electoral polls carried out in Italy in the last eight years and published on the web site of Department for Information and Publishing of Presidency of the Council of Ministers, according to the Authority Regulation. Particularly, they analyze the electoral polls considering how they respect the major quality dimensions and propose to this aim a study conducted on the basis of analysis scenarios. The results show that, even many gaps in terms of quality respect and information completeness persist again, quality culture is becoming a general rule for many opinion polls companies, encouraging in public opinion a greater knowledge of its importance.Key words: Quality; Completeness; Polls.Parole chiave: Qualitŕ; Completezza; Sondaggi.