Review

Examine any Product related work or Project related work is called reviews.
or
A Software Review is "A process or meeting during which a software product is examined by a project personnel, managers, users, customers, user representatives, or other interested parties for comment or approval".

Types of Reviews:

1.  Management Reviews
2.  Technical Reviews
3.  Code Reviews
4.  Test Case Reviews (Formal, Informal)

Formal Reviews: if any review is conducted with a prior plan and by following proper documentation and procedures are called formal reviews
Inspections and Audits are the best example of formal reviews.

Informal Reviews: if any review is conducted without following any procedures and documentation then reviews
Walk-through: Knowledge transfer sessions in the form of peer review

Varieties of Software Review :

1. Software Reviews may be divided into three categories:
2. Software Peer Reviews are conducted by the author of the work product, or by one or more colleagues of the author, to evaluate the technical content and/or quality of the work.
3. Software Management Reviews are conducted by management representatives to evaluate the status of work done and to make decisions regarding downstream activities.
4. Software Audit Reviews are conducted by personnel external to the software project, to evaluate compliance with specifications, standards, contractual agreements, or other criteria.

Objective of Reviews: Reviews are helpful to determine

1. Defects in Requirement.
2. Defects in Design.
3. Deviations in Coding Standards.
4. To confirm if the prepared test cases are enough to validate a software
5. Reviews helpful improve the organization process.