Software release life cycle
This articleneeds additional citations forverification.(April 2023) |
Thesoftware release life cycleis the process of developing, testing, and distributing a software product (e.g., anoperating system). It typically consists of several stages, such as pre- Alpha, Alpha, beta, and release candidate, before the final version, or "gold", is released to the public.
![](https://upload.wikimedia.org/wikipedia/commons/thumb/0/07/Software_dev2.svg/240px-Software_dev2.svg.png)
Pre- Alpha refers to the early stages of development, when the software is still being designed and built. Alpha testing is the first phase of formal testing, during which the software is tested internally usingwhite-box techniques.Beta testing is the next phase, in which the software is tested by a larger group of users, typically outside of the organization that developed it. The beta phase is focused on reducing impacts on users and may include usability testing.
After beta testing, the software may go through one or more release candidate phases, in which it is refined and tested further, before the final version is released.
Some software, particularly in the internet and technology industries, is released in a perpetual beta state, meaning that it is continuously being updated and improved, and is never considered to be a fully completed product. This approach allows for a more agile development process and enables the software to be released and used by users earlier in the development cycle.
Stages of development
[edit]Pre- Alpha
[edit]Pre- Alpha refers to all activities performed during the software project before formal testing. These activities can includerequirements analysis,software design,software development,andunit testing.In typicalopen sourcedevelopment, there are several types of pre- Alpha versions.Milestoneversions include specific sets of functions and are released as soon as the feature is complete.[citation needed]
Alpha
[edit]The Alpha phase of the release life cycle is the first phase ofsoftware testing( Alpha is the first letter of theGreek Alpha bet,used as the number 1). In this phase, developers generally test the software usingwhite-box techniques.Additional validation is then performed usingblack-boxorgray-boxtechniques, by another testing team. Moving to black-box testing inside the organization is known asAlpha release.[1][2]
Alpha software is not thoroughly tested by the developer before it is released to customers. Alpha software may contain serious errors, and any resulting instability could cause crashes or data loss.[3]Alpha software may not contain all of the features that are planned for the final version.[4]In general, external availability of Alpha software is uncommon forproprietary software,whileopen source softwareoften has publicly available Alpha versions. The Alpha phase usually ends with afeature freeze,indicating that no more features will be added to the software. At this time, the software is said to befeature-complete.A beta test is carried out followingacceptance testingat the supplier's site (the Alpha test) and immediately before the general release of the software as a product.[5]
Feature-complete
[edit]Afeature-complete(FC) version of a piece ofsoftwarehas all of its planned or primaryfeaturesimplemented but is not yet final due tobugs,performanceorstabilityissues.[6]This occurs at the end of Alpha testing indevelopment.
Usually, feature-complete software still has to undergobeta testingandbug fi xing,as well as performance or stability enhancement before it can go torelease candidate,and finallygoldstatus.
Beta
[edit]Beta, named afterthe second letter of the Greek Alpha bet,is the software development phase following Alpha. A beta phase generally begins when the software is feature-complete but likely to contain several known or unknown bugs.[7]Software in the beta phase will generally have many more bugs in it than completed software and speed or performance issues, and may still cause crashes or data loss. The focus of beta testing is reducing impacts on users, often incorporatingusability testing.The process of delivering a beta version to the users is calledbeta releaseand is typically the first time that the software is available outside of the organization that developed it. Software beta releases can be eitheropen or closed,depending on whether they are openly available or only available to a limited audience. Beta version software is often useful for demonstrations and previews within an organization and to prospective customers. Some developers refer to this stage as apreview,preview release,prototype,technical previewortechnology preview(TP),[8]orearly access.
Beta testersare people who actively report issues with beta software. They are usually customers or representatives of prospective customers of the organization that develops the software. Beta testers tend to volunteer their services free of charge but often receive versions of the product they test, discounts on the release version, or other incentives.[9][10]
Perpetual beta
[edit]Some software is kept in so-calledperpetual beta,where new features are continually added to the software without establishing a final "stable" release. As theInternethas facilitated the rapid and inexpensive distribution of software, companies have begun to take a looser approach to the use of the wordbeta.[11]
Open and closed beta
[edit]Developers may release either aclosed beta,or anopen beta;closed beta versions are released to a restricted group of individuals for a user test by invitation, while open beta testers are from a larger group, or anyone interested. Private beta could be suitable for the software that is capable of delivering value but is not ready to be used by everyone either due to scaling issues, lack of documentation or still missing vital features. The testers report any bugs that they find, and sometimes suggest additional features they think should be available in the final version.
Open betas serve the dual purpose of demonstrating a product to potential consumers, and testing among a wide user base is likely to bring to light obscure errors that a much smaller testing team might not find.
Release candidate
[edit]Arelease candidate(RC), also known as gamma testing or "going silver", is a beta version with the potential to be a stable product, which is ready to release unless significantbugsemerge. In this stage of product stabilization, all product features have been designed, coded, and tested through one or more beta cycles with no known showstopper-class bugs. A release is calledcode completewhen the development team agrees that no entirely new source code will be added to this release. There could still be source code changes to fix defects, changes to documentation and data files, and peripheral code for test cases or utilities. Beta testers, if privately selected, will often be credited for using the release candidate as though it were a finished product. Beta testing is conducted in a client's or customer's location and to test the software from a user's perspective.[citation needed]
Stable release
[edit]Also calledproduction release,thestable releaseis the lastrelease candidate(RC) which has passed all stages of verification and tests. Any known remaining bugs are considered acceptable. This release goes toproduction.
Some software products (e.g.Linux distributionslikeDebian) also havelong-term support(LTS) releases which are based on full releases that have already been tried and tested and receive only security updates. This allows developers to allocate more time toward product development instead of updating code or finding and fi xing newly introduced bugs due to outdated assumptions about the used system, language, or underlying libraries.[citation needed]
Release
[edit]Once released, the software is generally known as a "stable release". The formal term often depends on the method of release: physical media, online release, or a web application.[12]
Release to manufacturing (RTM)
[edit]![](https://upload.wikimedia.org/wikipedia/commons/thumb/9/9e/Satya_Nadella_Gears_of_War_4_Gold_Master.jpg/220px-Satya_Nadella_Gears_of_War_4_Gold_Master.jpg)
The term "release to manufacturing" (RTM), also known as "going gold", is a term used when a software product is ready to be delivered. This build may be digitally signed, allowing the end user to verify the integrity and authenticity of the software purchase. A copy of the RTM build known as the "gold master"or GM[13]is sent for mass duplication or disc replication if applicable. The terminology is taken from the audio record-making industry, specifically the process ofmastering.RTM precedes general availability (GA) when the product is released to the public. A golden master build (GM) is typically the final build of a piece of software in the beta stages for developers. Typically, foriOS,it is the final build before a major release, however, there have been a few exceptions.
RTM is typically used in certain retail mass-production software contexts—as opposed to a specialized software production or project in a commercial or government production and distribution—where the software is sold as part of a bundle in a related computer hardware sale and typically where the software and related hardware is ultimately to be available and sold on mass/public basis at retail stores to indicate that the software has met a defined quality level and is ready for mass retail distribution. RTM could also mean in other contexts that the software has been delivered or released to a client or customer for installation or distribution to the related hardware end user computers or machines. The term doesnotdefine the delivery mechanism or volume; it only states that the quality is sufficient for mass distribution. The deliverable from the engineering organization is frequently in the form of a golden master media used for duplication or to produce the image for the web.
General availability (GA)
[edit]![](https://upload.wikimedia.org/wikipedia/commons/thumb/5/51/ProductEndOfLifeCycle.png/220px-ProductEndOfLifeCycle.png)
General availability(GA) is the marketing stage at which all necessarycommercializationactivities have been completed and a software product is available for purchase, depending, however, on language, region, and electronic vs. media availability.[14]Commercialization activities could include security and compliance tests, as well as localization and worldwide availability. The time between RTM and GA can take from days to months before a generally available release can be declared, due to the time needed to complete all commercialization activities required by GA. At this stage, the software has "gone live".
Release to the Web (RTW)
[edit]Release to the Web(RTW) orWeb releaseis a means of software delivery that utilizes the Internet for distribution. No physical media are produced in this type of release mechanism by the manufacturer. Web releases have become more common as Internet usage grew.[citation needed]
Support
[edit]During its supported lifetime, the software is sometimes subjected to service releases,patchesorservice packs,sometimes also called "interim releases" or "maintenance releases" (MR). For example, Microsoft released three major service packs for the32-biteditions ofWindows XPand two service packs for the64-biteditions.[15]Such service releases contain a collection of updates, fixes, and enhancements, delivered in the form of a single installable package. They may also implement new features. Some software is released with the expectation of regular support. Classes of software that generally involve protracted support as the norm includeanti-virus suitesandmassively multiplayer online games.Continuing with this Windows XP example, Microsoft did offer paid updates for five more years after the end of extended support. This means that support ended on April 8, 2019.[16]
End-of-life
[edit]When software is no longer sold or supported, the product is said to have reached end-of-life, to be discontinued, retired, deprecated, abandoned, or obsolete, but user loyalty may continue its existence for some time, even long after its platform is obsolete—e.g., theCommon Desktop Environment[17]and SinclairZX Spectrum.[18]
After the end-of-life date, the developer will usually not implement any new features, fix existing defects, bugs, or vulnerabilities (whether known before that date or not), or provide any support for the product. If the developer wishes, they may release the source code, so the platform will live again, and be maintained by volunteers, and if not, it may be reverse-engineered later when it becomesabandonware.
History
[edit]Usage of the "Alpha /beta" test terminology originated atIBM.[citation needed]Similar terminologies for IBM's software development were used by people involved with IBM from at least the 1950s (and probably earlier). "A" test was theverificationof a new product before the public announcement. The "B" test was the verification before releasing the product to be manufactured. The "C" test was the final test before the general availability of the product. As software became a significant part of IBM's offerings, the Alpha test terminology was used to denote the pre-announcement test and the beta test was used to show product readiness for general availability. Martin Belsky, a manager on some of IBM's earlier software projects claimed to have invented the terminology. IBM dropped the Alpha /beta terminology during the 1960s, but by then it had received fairly wide notice. The usage of "beta test" to refer to testing done by customers was not done in IBM. Rather, IBM used the term "field test".
Major public betas developed afterward, with early customers having purchased a "pioneer edition" of the WordVision word processor for theIBM PCfor $49.95. In 1984,Stephen Maneswrote that "in a brilliant marketing coup, Bruce and James Program Publishers managed to get people topayfor the privilege of testing the product. "[19]In September 2000, aboxed versionofApple'sMac OS X Public Betaoperating system was released.[20]Between September 2005 and May 2006, Microsoft releasedcommunity technology previews (CTPs) forWindows Vista.[21]From 2009 to 2011,Minecraftwas in public beta.
In February 2005,ZDNetpublished an article about the phenomenon of a beta version often staying for years and being used as if it were at the production level.[22]It noted thatGmailandGoogle News,for example, had been in beta for a long time although widely used; Google News left beta in January 2006, followed by Google Apps (now namedGoogle Workspace), including Gmail, in July 2009.[12]Since the introduction ofWindows 8,Microsofthas called pre-release software apreviewrather thanbeta.All pre-release builds released through theWindows Insider Programlaunched in 2014 are termed "Insider Preview builds". "Beta" may also indicate something more like arelease candidate,or as a form of time-limited demo, or marketing technique.[23]
See also
[edit]- Application lifecycle management
- Application-release automation
- Application retirement
- Release engineering
- Release management
- Rolling release
- Software deployment
- Software versioning
References
[edit]- ^"Encyclopedia definition of Alpha version".PC Magazine.Archivedfrom the original on 2011-04-27.Retrieved2011-01-12.
- ^"What is an Alpha version of a game?".Archived fromthe originalon 2022-09-23.Retrieved2022-09-23.
- ^Ince, Darrel, ed. (2013). "Alpha software".A Dictionary of the Internet (3 ed.).Oxford University Press.ISBN978-0-19-174415-0.Retrieved2019-07-15.
- ^"The Next Generation 1996 Lexicon A to Z".Next Generation.No. 15.Imagine Media.March 1996. p. 29.
Alpha software generally barely runs and is missing major features like gameplay and complete levels.
- ^A Dictionary of Computer Science(7th ed.). Oxford University Press. 2016. p. 44.ISBN978-0-19-968897-5.
- ^Cusumano, Michael (1998).Microsoft Secrets: How the World's Most Powerful Software Company Creates Technology, Shapes Markets, and Manages People.Free Press. pp.202–203.ISBN978-0-684-85531-8.
- ^"The Next Generation 1996 Lexicon A to Z".Next Generation.No. 15.Imagine Media.March 1996. p. 30.
- ^"Technology Preview Features Support Scope".Red Hat.Retrieved2015-03-18.
- ^Amit Mehra, Rajib Lochan Saha (2017-06-19). "Utilizing Public Betas and Free Trials to Launch a Software Product".Production and Operations Management.Vol. 27, no. 11.
- ^Michelle M. Lang (2004-05-17). "Beta Wars".Design News.Vol. 59, no. 7.
- ^"Waiting with Beta'd BreathTidBITS#328 (May 13, 1996) ".1996-05-13. Archived fromthe originalon 2006-05-15.
- ^ab"Google Apps is out of beta (yes, really)".Google Blog.2009-07-07.Archivedfrom the original on 2011-01-21.Retrieved2011-01-12.
- ^"What is Golden Master (GM)? - Definition from Techopedia".Techopedia.2013-08-19.
- ^Luxembourg, Yvan Philippe (2013-05-20)."Top 200 SAM Terms – A Glossary Of Software Asset Management Terms".Operations Management Technology Consulting.Archivedfrom the original on 2013-08-10.Retrieved2013-05-21.
- ^"Microsoft Update Catalog".catalog.update.microsoft.Retrieved2024-05-03.
- ^"Microsoft Product Lifecycle Search".2012-07-20. Archived fromthe originalon 2012-07-20.Retrieved2024-05-03.
- ^"[cdesktopenv-devel] CDE 2.2.1 released | CDE - Common Desktop Environment".sourceforge.net.Retrieved2024-05-03.
- ^"ZX-Uno [ZX Spectrum Computer Clone Based on FPGA]".2018-01-05. Archived fromthe originalon 2018-01-05.Retrieved2024-05-03.
- ^Manes, Stephen(1984-04-03)."Taking A Gamble With Word Vision".PC Magazine- The Independent Guide To IBM Personal Computers.Vol. 3, no. 6.PC Communications Corp.pp. 211–221.ISSN0745-2500.Archivedfrom the original on 2015-03-17.Retrieved2015-02-15.
- ^"Apple Releases Mac OS X Public Beta"(Press release). Apple Inc. 2000-09-13.Retrieved2024-01-28.
- ^"Microsoft Windows Vista October Community Technology Preview Fact Sheet"(Press release). Microsoft. October 2005. Archived fromthe originalon 2011-04-30.Retrieved2011-02-22.
- ^Festa, Paul (2005-02-14)."A long winding road out of beta".Tech News on ZDNet.Archived fromthe originalon 2005-02-14.Retrieved2019-04-28.
- ^Houghton, David (2010-05-17)."The inconvenient truths behind betas".GamesRadar.Archivedfrom the original on 2011-04-30.