The IAAO Standard on Data Quality defines quality requirements for critical elements ofassessment data and provides guidance for meeting those requirements for use in mass appraisal.Assessment data for the purposes of this standard can be separated into property characteristic,economic, and geographic.This standard addresses quality for both the collection of new inventory and the management ofexisting inventory. For all types of assessment data, this standard outlines the general requirementsfor accuracy, currency, consistency, and completeness. Specific local standards should bedeveloped in accordance with this general standard.This standard is concerned with data as an input into the assessment process. It is not intended toprovide guidance for data related to the state of an assessment process (e.g., inspections and otheroperational processes) or other secondary uses. Assessors should decide whether to include thesefactors in the development of their own local standards.