# Design review

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This article is about the general concept. For Design reviews in [DoD](/source/United_States_Department_of_Defense) and [NASA](/source/NASA), see [Design review (U.S. government)](/source/Design_review_(U.S._government)). For the magazine, see [Design Review (publication)](/source/Design_Review_(publication)).

A **design review** is a milestone within a [product development](/source/Product_development) process whereby a [design](/source/Design) is evaluated against its [requirements](/source/Requirements_analysis) in order to verify the outcomes of previous activities and identify issues before committing to—and, if need be, to re-prioritise—further work.[1] The ultimate design review, if successful, therefore triggers the product launch or product release.

The conduct of design reviews is compulsory as part of [design controls](/source/Design_controls), when developing products in certain regulated contexts such as [medical devices](/source/Medical_devices).

By definition, a review must include persons who are external to the design team.

## Contents of a design review

In order to evaluate a [design](/source/Design) against its requirements, a number of means may be considered, such as:

- Physical tests.
- Engineering simulations.
- Examinations (Walk-through).

## Timing of design reviews

Most formalised [systems engineering processes](/source/Systems_engineering_process) recognise that the cost of correcting a fault increases as it progresses through the [development process](/source/Systems_Development_Life_Cycle). Additional effort spent in the early stages of development to discover and correct errors is therefore likely to be worthwhile. Design reviews are example of such an effort. Therefore, a number of design reviews may be carried out, for example to evaluate the design against different sets of criteria (consistency, [usability](/source/Usability), ease of [localisation](/source/Language_localisation), environmental) or during various stages of the design process.

## See also

- [Design review (U.S. government)](/source/Design_review_(U.S._government))
- [Hazard and operability study](/source/Hazard_and_operability_study)

## References

1. Ichida, Takashi (2019-12-06). [*Product Design Review: A Methodology for Error-Free Product Development*](https://books.google.com/books?id=9T33DwAAQBAJ&dq=%22Design+review%22+-wikipedia+product+development&pg=PA5). Routledge. p. 3. ISBN 978-1-351-42125-6.

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