<P> Data quality refers to the condition of a set of values of qualitative or quantitative variables . There are many definitions of data quality but data is generally considered high quality if it is `` fit for ( its ) intended uses in operations , decision making and planning '' . Alternatively , data is deemed of high quality if it correctly represents the real - world construct to which it refers . Furthermore , apart from these definitions , as data volume increases , the question of internal data consistency becomes significant , regardless of fitness for use for any particular external purpose . People 's views on data quality can often be in disagreement , even when discussing the same set of data used for the same purpose . Data cleansing may be required in order to ensure data quality . </P>
this type of it application control ensures that data is free from errors at the point of collection
Data cleansing