Data quality is one of the important factors which business users look at. The book has dedicated a chapter to data validation.

The data validation might break sometimes if the business process has changed or the logic for calculation has changed. An incorrect logic used in coding may lead to incorrect data when financial year changes.

Any issue has to be taken on priority and resolved quickly. The user should be made aware, and clear communication should be sent out about the time required to fix the new logic or business process.