A source code review is the process of examining and analyzing the source code of an application to identify any vulnerabilities, errors, or flaws that may compromise the security, functionality, or performance of the application. A source code review is the most effective way to identify an application backdoor prior to implementation, as it can detect any hidden or unauthorized code that may allow unauthorized access, bypass security controls, or execute malicious commands. A source code review can also help to improvethe quality and reliability of the application, and ensure compliance with the coding standards and best practices. References = CRISC Review Manual, 7th Edition, page 181.