Data Verifiction

• What is verification in data management?

  A check to ensure data matches the original
• Why are verification checks important?

  To ensure data contains as few mistakes as possible
• How do passengers verify their data at airports?

  By showing identification when checking in
• What does data verification confirm?

  The integrity and consistency of entered data
• What are the two main data verification methods?

  • Double Entry
  • Proofreading
• What is double entry in data verification?

  A method where data is entered twice for checking
• How does double entry help in data verification?

  It identifies the majority of mistakes
• What is a disadvantage of double entry?

  It doubles the workload and can be costly
• What is proofreading in data verification?

  A visual check of data against the original
• Where is proofreading commonly used?

  In pharmacies for checking prescriptions
• What is a disadvantage of proofreading?

  It can be time-consuming and expensive
• What are batch and hash totals used for?

  • To verify data entry in batches
  • To ensure data is entered exactly once
• What is a batch total?

  A manual count of documents before entry
• How does a batch total work?

  It compares manual and computer counts
• What is a limitation of batch totals?

  It won't detect missing or duplicate data
• What are control totals and hash totals?

  Types of batch totals for error identification
• What is a control total?

  A meaningful total like hours worked
• What is a hash total?

  A total with no clear meaning
• What happens if the manually-calculated total and computer total differ?

  A mistake has been made during entry
• What is the purpose of data validation?

  To ensure data is sensible and reasonable
• What is a limitation of data validation and verification?

  They cannot eliminate all data entry errors
• Why might original data contain errors?

  Because mistakes can exist in the original document
• What should data users be aware of regarding validation and verification?

  They have limits and cannot prevent all errors