Advantages of Document Review

•  Information contained in the extant document(s) is independently verifiable.  
• The document review process can be done independently, without needing to solicit extensive input from other sources.  
•  Document review is typically less expensive than collecting the data on your own.
• The document review provides a behind-the-scenes look at a program that may not be directly observable.
• The document review may bring up issues not noted by other means.