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{{short description|Wikipedia editing guideline}}
{{redirect|WP:CLASSES|the catalogue of CSS classes|WP:CLASS}}
{{pp-move-indef|small=yes}}
{{subcat guideline|editing guideline|Version 1.0 Editorial Team Assessment|WP:ASSESS|WP:1.0/A}}
{{Nutshell|Anyone can add a quality assessment below GA-class, regardless of WikiProjects. Higher ratings require more formal processes and consensus.}}
The following system is used by the Wikipedia community to assess the quality of an article. The system is based on a letter scheme that reflects principally how factually complete the article is, though [[WP:MOS|language quality]] and [[WP:Layout|layout]] are also factors.
 
The quality assessments are mainly performed by Wikipedia editors, who tag Talk pages of articles; [[:Category:Autoassessment bots|some bots]] set the ''class'' tag for assessment based on other Talk tags or based on editor selected values. Editor assistance tools like [[User:Evad37/rater#Assessment advice|Rater]] apply automated [[mw:ORES#Existing article assessment|ORES]] or [[mw:Machine Learning/Modernization#Lift Wing|Lift Wing]] article assessment, offering a prediction based on structural characteristic of the page (eg sectioning and references) that correlate with quality, for the class tag. These tags are then [[Wikipedia:Version 1.0 Editorial Team/Index|collected by a bot]], which generates output such as a [[Wikipedia:Version 1.0 Editorial Team/Chemistry articles by quality log|log]] and [[Wikipedia:Version 1.0 Editorial Team/Chemistry articles by quality statistics|statistics]]. For more information, see ''[[Wikipedia:Version 1.0 Editorial Team/Using the bot|Using the bot]]''. In 2023 [[WP:PIQA|project-independent quality assessments]] were introduced, so editors only have to rate an article once and it applies to all associated projects.
 
Most grades are assessed by individual editors according to the criteria on this page. Generally speaking, all editors, including editors who have written or improved an article, are encouraged to [[Wikipedia:Boldly|boldly]] set any quality rating that they believe is appropriate, except for the GA, FA, and A-class ratings. GAs (Good Articles) are generally reviewed by a single independent editor after a nomination at [[WP:Good article nominations]]. FAs (Featured Articles) are reviewed by several editors at [[WP:Featured article candidates]]. Be aware that [[:Category:WikiProjects using a non-standard quality scale|a few projects]] have opted out of the standard quality scale, and use their own variation of the criteria more tuned for the subject area, such as [[Wikipedia:WikiProject Military history/Assessment#Quality scale|Wikipedia:WikiProject Military history/Assessment]].
 
It is vital that editors not take these assessments of their contributions personally. It is understood that we each have our own opinions of the priorities of the objective criteria for a perfect article. If there is disagreement over the quality rating of an article, then it should be discussed on the article's talk page.
 
As of November 2022, [[#Statistics|over seven million articles]] have been assessed. Several other languages are also using this assessment system or a derivative thereof.
 
== Grades ==
<noinclude>{{mbox|text=The [[WP:ASSESS|assessment ratings]] mentioned here have '''no relationship whatsoever''' to [[grading in education]] or [[review|review scores]] like A/B/C/D/F or other rating systems (10-point scale, 5-star system, etc.) that you might see on [[homework]] and [[product review]]s. They represent the amount of work needed to bring the article to the next rating, which depends on <u>both</u> the quality of the writing <u>and</u> the depth of coverage of the topic, which greatly [[WP:CL-RULE|varies by subject]].<p>Note that the differences between ''Stub'', ''Start'', and ''C'' classes are fairly subjective; at those ratings, the best way to improve the article is to look at the specific criteria for ''B''-Class and aim to satisfy those. Specific feedback can often be obtained on a relevant [[WP:WikiProject|WikiProject]]'s talk page. Those can usually be found on the talk page of the article, but [[WP:WikiProject|searching for them]] can often reveal more topical projects. For instance, if you wrote about a Kenyan astronomer, you might want to search for "Biography", "Kenya", and "Astronomy" to find [[WP:WikiProject Biography|WikiProject Biography]], [[WP:WikiProject Kenya|WikiProject Kenya]] and [[WP:WikiProject Astronomy|WikiProject Astronomy]].</p>}}</noinclude>
{{anchor|Quality scale}}
{{Grading scheme}}
'''Note:''' Some WikiProjects omit some of the standard classes, most often A-Class, especially when they lack an assessment team.
 
== Non-standard grades ==
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Some [[Wikipedia:WikiProject|WikiProjects]] use other assessments for mainspace content that do not fit into the above scale:
 
{| class="wikitable" style="width: 100%;"
|+ Other WikiProject assessments
|-
! Label
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| {{Future-Class}}
| A topic for which details are subject to change often. The article covers a future topic, e.g., a forthcoming election or album release, and article content may change as new information arises.
| Amount of meaningful content varies over time as the projected event dr|draws works = ''[[Abraham Lincoln (1920 statue)|Abraham Lincoln]]''tusnear.
| Material added might be speculative and should be carefully sourced.
| {{oldid|Next United Kingdom general election|950155532|Next United Kingdom general election}} (as of October 2019)
|-
| {{SIA-Class}}
| Any [[Wikipedia:Set index articles|set index article]] (SIA) page falls under this class. These are List articles about a set of items of a specific type that also share the same (or similar) name.
| The page lists related items of the same name.
| An SIA need not follow the formatting rules for disambiguation pages
| {{oldid|USS Yorktown|842550147|USS Yorktown}} (as of May 2018)
|-
| {{Disambig-Class}}
| Any [[Wikipedia:Disambiguation|disambiguation]] page falls under this class.
| The page directs the reader to other pages of the same title.
| Additions should be made as new articles of that name are created.
| {{oldid|Jackson|911538376|Jackson}} (as of August 2019)
|-
| {{Redirect-Class}}
| Any [[Wikipedia:Redirect|redirect]] falls under this class.
| The page does not display any article content and redirects to a related topic.
| Ensure that the redirect is appropriately [[Wikipedia:Categorizing redirects|categorized]].
| {{oldid|American breakfast|745451474|American breakfast}} (as of October 2016)
|-
| {{Needed-Class}}
| May be used to identify redirects that could be expanded into articles, or articles with content that could be [[Wikipedia:Splitting|split]] off to form a new page.
| Content may not yet exist for the desired topic.
| Editors are encouraged to [[Wikipedia:Be bold|be bold]] when updating the encyclopedia.
| {{oldid|Free City of Mainz|828817613|Free City of Mainz}} (as of March 2018)
|-
| {{NA-Class}}
| A page that does not fit into any other category. Used as a "catch-all" by all WikiProjects.
| Depends on the type of page.
| Depends on the type of page.
| N/A
|}
 
See also [[Wikipedia:WikiProject Military history/Assessment]] which utilises a parallel scheme of "CL-Class", "BL-Class" and "AL-Class" for list articles.
 
=== Non-mainspace content ===
Further grades are commonly used by WikiProjects to categorize relevant pages in other [[Wikipedia:Namespace|namespaces]]. The precise application of these grades may vary depending on their usage by individual WikiProjects.
 
{| class="wikitable" style="width: 100%;"
|+ Non-mainspace assessments
|-
! Label
! Criteria
! Example
|-
| {{Category-Class}}
| Any [[Help:Category|category]] falls under this class.
| [[:Category:George Orwell]]
|-
| {{Draft-Class}}
| Any [[Wikipedia:Drafts|draft]] falls under this class. These are typically found in the Draft namespace, but may also be in the [[Wikipedia:User pages|User namespace]].
| [[Draft:Example]]
|-
| {{File-Class}}
| Any [[Help:Files|file]] falls under this class; may also include [[Commons:Commons:Timed Text|timed text]] pages.
| [[:File:Flag of Australia.svg]]
|-
| {{FM-Class}}
| Any file which has attained [[Wikipedia:Featured pictures|featured picture]] or [[Wikipedia:Featured sounds|featured sound]] status.
| [[:File:Felis silvestris silvestris.jpg]]
|-
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==Importance assessment==
There is a [[Wikipedia:Version 1.0 Editorial Team/Release Version Criteria#Priority of topic|separate scale for rating articles for ''importance'' or ''priority'']], which is unrelated to the ''quality'' scale outlined here. Unlike the quality scale, the priority scale varies based on the project scope. See also the template {{tl|importance scheme}}.
 
==Statistics==
The [[User:WP 1.0 bot|WP 1.0 bot]] tracks assessment data (article quality and importance data for individual WikiProjects) assigned via talk page banners. If you would like to add a new WikiProject to the bot's list, please read the instructions at [[Wikipedia:Version 1.0 Editorial Team/Using the bot]].
 
The global summary table below is computed by taking the highest quality and importance rating for each assessed article in the main namespace.
 
{{Wikipedia:Version 1.0 Editorial Team/Statistics}}
 
== FAQ ==
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; Are these ratings official? : Not really; these ratings are meant primarily for the internal use of the project, and usually do not imply any official standing within Wikipedia as a whole.
 
=== Assessing artiarticles ===
 
; Who can assess articles?
: In general, anyone can add or change an article's rating. However, assessing an article as [[Wikipedia:Version 1.0 Editorial Team/Assessment/A-Class criteria|"A-Class"]] generally requires the agreement of at least two editors, and the "GA" and "FA" labels should be used only on articles that have been reviewed and are currently designated as [[Wikipedia:Good articles|good articles]] or [[Wikipedia:Featured articles|featured article]]s, respectively. Individual WikiProjects may also have more formal procedures for rating an article, and please note that the WikiProject bears ultimate responsibility for resolving disputes.
; How do I assess an article?
: Consult the [[#Quality scale|quality scale]] above; once you have chosen the level that seems to be closest to the article, go to the article's talk page and set the ''class'' parameter in the WikiProject banner template to the level's name (omitting "Class" from the end). For example, to rate an article as "B-Class", use <code>|class=B</code> in the banner. Again, the "FA" and "GA" labels should not be added to articles unless they are currently designated as such. Tools in the [[#See also|See also]] section can help with the assessment process.
; How can I ask for an article to be assessed?
: To have an independent editor review an article, post a request at [[Wikipedia:WikiProject Wikipedia/Assessment#Requesting an assessment]].
 
=== Common concerns ===
 
; Someone put a project banner template on an article, but it's not really within the WikiProject's scope. What should I do?
: Because of the large number of articles we deal with, we occasionally make mistakes and add tags to articles that shouldn't have them. If you notice one, feel free to remove the tag, and optionally leave a note on the article's talk page (or directly with the person who tagged the article). See [[Wikipedia:WikiProject Council/Guide#Article tagging]] for more information.
; What if I don't agree with a rating?
: Feel free to change it—within reason—if you think a different rating is justified; in the case of major disputes, the WikiProject as a whole can discuss the issue and come to a consensus as to the best rating.
; Aren't the ratings subjective?
: Yes, they are somewhat subjective, but it's the best system we've been able to devise. If you have a better idea, please don't hesitate [[WT:Content assessment|to let us know]]!
; Why didn't the reviewer leave any comments?
: Due to the volume of articles that need to be assessed, we are unable to leave detailed comments in most cases. If you have particular questions, you might ask the person who assessed the article; they will usually be happy to provide you with their reasoning. [[Wikipedia:Peer review]] is the process designed to provide detailed comments.
 
== See also ==
* [[Wikipedia:Article assessment (historical)]], the previous version superseded by this version
* [[Wikipedia:Assessing articles]], an essay on the criteria and purpose of article assessments
* [[Wikipedia:Metadata gadget]], a script (and [[Wikipedia:Gadget|gadget]]) that finds articles' assessment information from the talk page and puts it in the article's header
* [[User:Evad37/rater]], a currently maintained tool that helps fill in assessments and other parameters for WikiProject banners. A complete remake of [[User:Kephir/gadgets/rater]], a script for tagging articles' talk pages with assessment information.
* [[User:N8wilson/AQFetcher]], a script that stylizes links on Wikipedia according to the assessed quality of the target article
* [[Wikipedia:Article Feedback Tool]], a historical initiative of the Wikimedia Foundation to engage Wikimedia readers in the assessment of article quality
* [[Wikipedia:Data mining Wikipedia]], a potential use of WikiProject assessments
* {{Cl|Articles by quality}} - List of articles by their quality
 
[[Category:Wikipedia 1.0 assessments| ]]
[[Category:Wikipedia project content guidelines]]
[[Category:Wikipedia article assessment| ]]
[[Category:Wikipedia article assessment criteria]]