Data Quality refers to the condition or characteristics of data that determine its ability to serve its intended purpose effectively. High-quality data ensures that it is accurate, complete, consistent, timely, and relevant for decision-making, analysis, and operational processes. Poor data quality can lead to flawed decisions, inefficiencies, and increased costs.

Key Dimensions of Data Quality

  1. Accuracy: The data correctly represents the real-world entity or event it is intended to describe.
  2. Completeness: All required data is present and available. Missing data can impact analysis and decision-making.
  3. Consistency: Data should be uniform and free from contradictions within and across datasets.
  4. Timeliness: Data should be up-to-date and available when needed.
  5. Validity: Data should conform to the specified format, standards, or rules (like date formats, phone number formats, etc.).
  6. Uniqueness: There should be no duplicate records unless explicitly required.
  7. Integrity: Relationships between datasets should be maintained, especially in relational databases.

Why Data Quality Matters

How to Improve Data Quality