See the "Madison Wells, Audit Manager" case for this question.

While reviewing the long-term debt workpapers, neither Madison nor Alanis discovered the critical error Blackwell had made when testing Le Prix's compliance with its debt covenants. What auditing standards, if any, dictate that audit workpapers be reviewed by senior members of an audit team? What is the overall nature and purpose of the audit workpaper review process and how thorough or detailed should workpapers be reviewed?