Measurement articles Importance Top High Mid Low None Total Quality A 1 1 B 7 3 7 4 21 C 14 34 29 18 95 Start 12 30 78 62 182 Stub 1 12 58 207 7 285 List 1 2 3 6 Assessed 35 79 174 295 7 590 Unassessed 1 7 8 Total 36 79 174 295 14 598

Shortcut: WP:MEASURE/A

The WikiProject Measurement assessment scheme is a two-dimensional qualitative classification of articles in the fields of metrology and measurement in general, which aims to give basic information about each article within the subjective notions of "quality" and "importance". It is based on the assessment scheme introduced by WikiProject Chemicals in 2005 and further developed by the Version 1.0 Editorial Team (WP1.0). Schemes of this type have been shown to be reasonably robust over a wide range of subject areas and a large number of individual reviewers, although this is not to pretend that measurement uncertainty has somehow been eliminated.

The quality scheme consists of a five-point scale (Stub–Start–C–B–A) assessed by reviewers from WikiProject Measurement, complimented by the quality grades attributed by centralized Wikipedia assessments (good articles and featured articles). It has proved impractical to separate the variables of "encyclopedic content" and "Wikipedia style", although it is assumed that project reviewers will, in general, be more concerned with aspects relating to the metrological content of articles than external reviewers, and hence correspondingly less concerned with aspects of style. The scale may be viewed as the one-dimensional projection of some hypothetical two-dimensional classification. Once an article reaches A-Class, it is considered "complete", although obviously edits will continue to be made.

It is critical that people not take these assessments personally. It is understood that we all have different priorities and different opinions about what makes a perfect article. The aim is to provide a tool for the project and for all editors who are interested in topics related to measurement. While a volunteer project cannot tell people what to do, and all contributions are welcome, the assessment scheme provides basic information about what needs to be done at some point and by somebody, and which are the more important among the outstanding tasks.

Contents 1 Quality scale 1.1 Project scale for prose articles 1.1.1 A-class 1.1.2 B-class 1.1.3 List-class 1.2 Project scale for other types of page 1.3 Community scale 2 Importance scale

[edit] Quality scale

[edit] Project scale for prose articles

Any editor may assess an article into one of these five classes, although it is obviously helpful if the reviewer has at least some knowledge of the general subject area. Article assessments can and will be modified if the article doesn't meet the criteria below, although the most constructive approach is to improve the article so that it fulfills the criteria. To try to ensure some consistency of grading between different subject areas on Wikipedia, WP:MEASURE uses standardized criteria for B-class assessments and interdisciplinary peer review for A-class assessments (details below).

Label	WP 1.0 criteria	Reader's experience	Editing suggestions	Example
A {{A-Class}}	The article is well organized and essentially complete, having been reviewed by impartial reviewers from a WikiProject or elsewhere. Good article status is not a requirement for A-Class. More detailed criteria Shortcuts: WP:ACLASS WP:A? Provides a well-written, clear and complete description of the topic, as described in Wikipedia:How to write a great article. It should be of a length suitable for the subject, appropriately structured, and be well referenced by a broad array of reliable sources. It should be well illustrated, with no copyright problems. Only minor style issues and other details need to be addressed before submission as a featured article candidate. See the A-Class assessment departments of some of the larger WikiProjects (e.g. WikiProject Military history, WikiProject Films).	Very useful to readers. A fairly complete treatment of the subject. A non-expert in the subject matter would typically find nothing wanting.	Expert knowledge may be needed to tweak the article, and style issues may need addressing. Peer-review may help.	Apothecaries' system (as of February 2009)
B {{B-Class}}	The article is mostly complete and without major issues, but requires some further work to reach Good Article standards. B-Class articles should meet the six B-Class criteria. More detailed criteria The article is suitably referenced, with inline citations where necessary. It has reliable sources, and any important or controversial material which is likely to be challenged is cited. The use of citation templates such as {{cite web}} is not required, but the use of <ref></ref> tags is encouraged. The article reasonably covers the topic, and does not contain obvious omissions or inaccuracies. It contains a large proportion of the material necessary for an A-Class article, although some sections may need expansion, and some less important topics may be missing. The article has a defined structure. Content should be organized into groups of related material, including a lead section and all the sections that can reasonably be included in an article of its kind. The article is reasonably well-written. The prose contains no major grammatical errors and flows sensibly, but it certainly need not be "brilliant". The Manual of Style need not be followed rigorously. The article contains supporting materials where appropriate. Illustrations are encouraged, though not required. Diagrams and an infobox etc. should be included where they are relevant and useful to the content. The article presents its content in an appropriately accessible way. It is written with as broad an audience in mind as possible. Although Wikipedia is more than just a general encyclopedia, the article should not assume unnecessary technical background and technical terms should be explained or avoided where possible.	Readers are not left wanting, although the content may not be complete enough to satisfy a serious student or researcher.	A few aspects of content and style need to be addressed, and expert knowledge is increasingly needed. The inclusion of supporting materials should also be considered if practical, and the article checked for general compliance with the manual of style and related style guidelines.	Kelvin (as of February 2009)
C {{C-Class}}	The article is substantial, but is still missing important content or contains a lot of irrelevant material. The article should have some references to reliable sources, but may still have significant issues or require substantial cleanup. More detailed criteria The article is better developed in style, structure and quality than Start-Class, but fails one or more of the criteria for B-Class. It may have some gaps or missing elements; need editing for clarity, balance or flow; or contain policy violations such as bias or original research. Articles on fictional topics are likely to be marked as C-Class if they are written from an in-universe perspective.	Useful to a casual reader, but would not provide a complete picture for even a moderately detailed study.	Considerable editing is needed to close gaps in content and address cleanup issues.	Ampere (as of February 2009)
Start {{Start-Class}}	An article that is developing, but which is quite incomplete and, most notably, lacks adequate reliable sources. More detailed criteria The article has a usable amount of good content, but it is weak in many areas, usually in referencing. Quality of the prose may be distinctly unencyclopedic, and MoS compliance non-existent; but the article should satisfy fundamental content policies such as notability and BLP, and provide enough sources to establish verifiability. No Start-Class article should be in any danger of being speedily deleted.	Provides some meaningful content, but the majority of readers will need more.	Provision of references to reliable sources should be prioritised; the article will also need substantial improvements in content and organisation.	Physical quantity (as of February 2009)
Stub {{Stub-Class}}	A very basic description of the topic. More detailed criteria The article is either a very short article or a rough collection of information that will need much work to become a meaningful article. It is usually very short, but if the material is irrelevant or incomprehensible, an article of any length falls into this category.	Provides very little meaningful content; may be little more than a dictionary definition	Any editing or additional material can be helpful. The provision of meaningful content should be a priority.	Fermi (length) (as of February 2009)
List {{List-Class}}	An article that meets the definition of a Stand-alone List. It should contain many wikilinks, with descriptions.	There is no one way to make a list, but it should be logical and useful to the reader.	Lists can be anything from a stub to a Featured List.	SI derived unit (as of February 2009)

[edit] A-class

The decision on the B-class/A-class boundary is the most difficult to make, especially for a small project such as WP:MEASURE. The basic criterion is "well organized and essentially complete".

"Essentially complete" doesn't mean "exhaustive". There are several issues which need to be considered, such as article length, the likely audience of the article and the appropriate weight to be given to different aspects of the article topic.

"Well organized" should mean essentially free from serious style faults, although not necessarily to the degree that is required for a featured article candidate, either in the article itself or the effort put into reviewing for style matters.

If the reviewer can find something which he/she thinks should definitely be in the article but isn't, the article is not A-class. If the reviewer cannot find any such deficiencies in the encyclopedic content of the article, he/she should look for other people who might be able to find them. The way to do this is to open a peer review on the article, and notify any WikiProjects whose field of interest might touch on the article subject. For Apothecaries' system, the following projects were contacted: Physics, Chemistry, Pharmacology, History of science, Medicine, Science. A note should also be placed on this project's talkpage, obviously!

[edit] B-class

WP:MEASURE assesses B-class against the six B-class criteria developed at WP1.0. The project banner will not allow an reviewer to assess an article as B-class unless the reviewer fills in the checklist to show that all criteria have been checked and are fulfilled.

[edit] List-class

List-class exists as a recognition of the difficulty in assigning a meaningful quality criteria to many lists. It is an optional class: lists may also be assessed using the five main grades above if the reviewer is confident that the list meets the relevant criteria.

[edit] Project scale for other types of page

The other classes listed here are used purely for project management purposes. Pages tagged with these assessment classes do not contain encyclopedic content as such, although they may form part of the encyclopedia (Template-class and Cat-class).

Label	Criteria	Reader's experience	Editing suggestions	Example
Template {{Template-Class}}	Any template falls under this class, except those used purely for internal management (see Project-Class below). The most common types of content template include infoboxes and navboxes.	Different types of template serve different purposes. Infoboxes provide easy access to key pieces of infomation about the subject. Navboxes are for the purpose of grouping together related subjects into an easily accessible format, to assist the user in navigating between articles.	Beware of too many different templates, as well as templates that give either too little, too much, or too specialized information.	Template:TemperatureScales
Category {{Cat-Class}}	Any category falls under this class.	Categories are mainly used to group together articles within a particular subject area.	Large categories may need to be split into one or more subcategories. Be wary of articles that have been miscategorized.	Category:Measurement
Disambig {{Disambig-Class}}	Any 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.	unused (as of February 2009)
Project {{Project-Class}}	Pages which are used for the internal management of the WikiProject.	The page does not have article content.	BOLDness and CIVILity!	this page
NA {{NA-Class}}	Any non-article page that does not fit into any other category.	The page does not have article content.	May or may not apply, depending on the type of page.	unused (as of February 2009)

[edit] Community scale

These classes are awarded by centralized Wikipedia processes and the assessment and review is independent of WP:MEASURE. For more details, see Wikipedia:Featured article candidates, Wikipedia:Featured list candidates and Wikipedia:Good article nominations respectively.

When an article (or list) receives one of these Community-level grades, the relevant parameter on the project banner should be set: FA=yes, FL=yes, GA=yes. Do not use class=FA etc: the banner will interpret these as A-class (for FA) or B-class (for GA) assessments, but the article will not be correctly categorized unless the additional parameter is also set. The community grades for measurement articles are not followed by the bot to avoid double-counting of articles.

Label	WP 1.0 criteria	Reader's experience	Editing suggestions	Example
FA {{FA-Class}}	The article has attained Featured article status. More detailed criteria The article must meet the featured article criteria: A featured article exemplifies our very best work and is distinguished by professional standards of writing, presentation, and sourcing. In addition to meeting the requirements for all Wikipedia articles, it has the following attributes. It is— (a) well-written: its prose is engaging, even brilliant, and of a professional standard; (b) comprehensive: it neglects no major facts or details and places the subject in context; (c) well-researched: it is a thorough and representative survey of the relevant literature on the topic. Claims are verifiable against high-quality reliable sources and are supported with citations; this requires a "References" section that lists these sources, complemented by inline citations where appropriate; (d) neutral: it presents views fairly and without bias; and (e) stable: it is not subject to ongoing edit wars and its content does not change significantly from day to day, except in response to the featured article process. It follows the style guidelines, including the provision of— (a) a lead: a concise lead section that summarizes the topic and prepares the reader for the detail in the subsequent sections; (b) appropriate structure: a system of hierarchical section headings and a substantial but not overwhelming table of contents; and (c) consistent citations: where required by criterion 1c, consistently formatted inline citations using either footnotes (<ref>Smith 2007, p. 1.</ref>) or Harvard referencing (Smith 2007, p. 1)—see citing sources for suggestions on formatting references; for articles with footnotes, the meta:cite format is recommended. Images. It has images that follow the image use policy and other media where appropriate, with succinct captions, brief and useful alt text when feasible, and acceptable copyright status. Non-free images or media must satisfy the criteria for inclusion of non-free content and be labeled accordingly. Length. It stays focused on the main topic without going into unnecessary detail (see summary style).	Professional, outstanding, and thorough; a definitive source for encyclopedic information.	No further content additions should be necessary unless new information becomes available; further improvements to the prose quality are often possible.	unused (as of February 2009)
FL {{FL-Class}}	The article has attained Featured list status. More detailed criteria The article must meet the featured list criteria: Prose. It features professional standards of writing. Lead. It has an engaging lead that introduces the subject and defines the scope and inclusion criteria. Comprehensiveness. (a) It comprehensively covers the defined scope, providing at least all of the major items and, where practical, a complete set of items; where appropriate, it has annotations that provide useful and appropriate information about the items. (b) In length and/or topic, it meets all of the requirements for stand-alone lists; it is not a content fork, does not largely recreate material from another article, and could not reasonably be included as part of a related article. Structure. It is easy to navigate through and includes, where helpful, section headings and table sort facilities. Style. It complies with the Manual of Style and its supplementary pages. (a) Visual appeal. It makes suitable use of text layout, formatting, tables, and colour; and it has a minimal proportion of red links. (b) Media files. It has images and other media, if appropriate to the topic, that follow Wikipedia's usage policies, with succinct captions and alternative (alt) text if necessary. Non-free images and other media satisfy the criteria for the inclusion of non-free content and are labeled accordingly. Stability. It is not the subject of ongoing edit wars and its content does not change significantly from day to day, except in response to the featured list process.			unused (as of February 2009)
GA {{GA-Class}}	The article has attained Good article status. More detailed criteria The article must meet the good article criteria: Well-written: (a) the prose is clear and the spelling and grammar are correct; and (b) it complies with the manual of style guidelines for lead sections, layout, jargon, words to avoid, fiction, and list incorporation. Factually accurate and verifiable: (a) it provides references to all sources of information in the section(s) dedicated to the attribution of these sources according to the guide to layout; (b) it provides in-line citations from reliable sources for direct quotations, statistics, published opinion, counter-intuitive or controversial statements that are challenged or likely to be challenged, and contentious material relating to living persons—science-based articles should follow the scientific citation guidelines; and (c) it contains no original research. Broad in its coverage: (a) it addresses the main aspects of the topic; and (b) it stays focused on the topic without going into unnecessary detail (see summary style). Neutral: it represents viewpoints fairly and without bias. Stable: it does not change significantly from day-to-day because of an ongoing edit war or content dispute. Illustrated, if possible, by images: (a) images are tagged with their copyright status, and valid fair use rationales are provided for non-free content; and (b) images are relevant to the topic, and have suitable captions.	Useful to nearly all readers, with no obvious problems; approaching (although not equalling) the quality of a professional encyclopedia.	Some editing by subject and style experts is helpful; comparison with an existing featured article on a similar topic may highlight areas where content is weak or missing.	Kilogram (as of October 2008)

[edit] Importance scale

Within a WikiProject, importance or priority must be regarded as a relative term. If importance values are applied within a specific project, these only reflect the perceived importance to that project. An article judged to be "Top-Class" in one context may be only "Low-Class" in another.

– Wikipedia:Version 1.0 Editorial Team/Release Version Criteria#Importance of topic

The WikiProject Measurement importance scale is internal, relative and, of course, subjective. It has been adapted from the scale used at WikiProject Psychology.

Importance	WP 1.0 criteria	Project criteria	Examples
Top	Subject is a must-have for a print encyclopedia	Subject is a must-have for Category:Measurement and is considered a core topic. The article is a likely target for encyclopedic research. Metrologists and other experts in measurement will generally be well-versed on the topic, and many non-specialists will likely have some familiarity with it.	SI base units and their corresponding physical quantities
High	Subject contributes a depth of knowledge	Subject contributes a depth of knowledge to the field of metrology. Most experts in measurement will be familiar with the topic. The subject can be found in most academic studies of metrology, and a significant amount of published research exists for it.	SI derived units and their corresponding physical quantities The most widely used customary units in English-speaking countries
Mid	Subject fills in more minor details	Subject fills in more minor details but is still important to the field of metrology or to measurement in general. Many specialists are knowledgeable of the topic. Published research from a variety of sources exists for the subject.	Other customary units used in English-speaking countries
Low	Subject is mainly of specialist interest.	Subject is peripheral knowledge to the field of metrology and possibly trivial but still notable. There may be limited research on the topic, or most professionals in metrology have not yet taken note of it.	Customary units in non-English-speaking countries. Organizations and laboratories in the field of metrology
NA	Any non-article page that does not fit into any other category.	The page does not have article content. List-Class pages should not be tagged as NA-importance, but templates and categories should be. All project pages are NA-importance.	This page

There are also several external lists of "very important articles". For example, there are twenty articles related to measurement on the list of vital articles. The fact that an article is on one (or more) of these lists may lead to an editor placing a higher project importance rating on the article than would be suggested by the examples above: the scale is only a guideline, and there may be some exceptions.