According to IIA guidance, sufficient and reliable information is characterized by the ability to reach consistent audit conclusions regardless of who performs the audit. This means that the information collected during the audit is adequate, factual, and well-documented so that different auditors would be able to draw the same conclusions based on the evidence. Consistency in audit conclusions enhances the reliability and credibility of the audit process.
Reference:
The Institute of Internal Auditors (IIA) Practice Guide: Quality Assurance and Improvement Program IIA Standard 2310 - Identifying Information IIA Standard 2330 - Documenting Information