Advantages of Software Review

1. Defects can be identified earlier stage of development (especially in formal review). 
2. Earlier inspection also reduces the maintenance cost of software. 
3. It can be used to train technical authors. 
4. It can be used to remove process inadequacies that encourage defects. 

Software Review is a systematic inspection of software by one or more individuals who work together to find and resolve errors and defects in the software during the early stages of the Software Development Life Cycle (SDLC). A software review is an essential part of the Software Development Life Cycle (SDLC) that helps software engineers in validating the quality, functionality, and other vital features and components of the software. It is a whole process that includes testing the software product and it makes sure that it meets the requirements stated by the client. 

Usually performed manually, software review is used to verify various documents like requirements, system designs, codes, test plans, and test cases.