Beta

A software release refers to the distribution, whether public or private, of an initial or new and upgraded version of a computer software product. more...

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Each time a software program or system is changed, the programmers and company doing the work decide on how to distribute the program or system, or changes to that program or system. Software patches are one method of distributing the changes, as are downloads and compact discs.

The software release life cycle is composed of different stages that describe the stability of a piece of software and the amount of development it requires before final release. Each major version of a product usually goes through a stage when new features are added, or the alpha stage; a stage when it is being actively debugged, or the beta stage; and finally a stage when all important bugs have been removed, or the stable stage. Intermediate stages may also be recognized. The stages may be formally announced and regulated by the project's developers, but sometimes the terms are used informally to describe the state of a product. Conventionally, code names are often used by many companies for versions prior to the release of the product, though the actual product and features are rarely secret.

Software release stages

Pre-alpha

Sometimes a build known as pre-alpha is issued, before the release of an alpha or beta. In contrast to alpha and beta versions, the pre-alpha is usually not "feature complete". At this stage designers are still determining exactly what functionalities the product should and should not have.

Alpha

The alpha version of a product still awaits full debugging or full implementation of all its functionality but satisfies a majority of the software requirements. It often lacks features promised in the final release but demonstrates the feasibility and basic structure of the software. As the first major stage in the release lifecycle, it is named after the Greek letter alpha, the first letter in the Greek alphabet.

The alpha build of the software is the first build delivered to the software testers.

In the first phase of alpha testing, developers test the software using white box techniques. Additional inspection is then performed using black box or grey box techniques. This is usually done by another dedicated testing team sometimes concurrently. Moving to black box testing is often known as the second stage of alpha testing.

Beta

A beta version or beta release usually represents the first version of a computer program that implements all features in the initial requirements analysis. It is likely to be useful for internal demonstrations and previews to select customers, but unstable and not yet ready for release. Some developers refer to this stage as a preview, as a technical preview (TP) or as an early access. As the second major stage in the release lifecycle, following the alpha stage, it is named after the Greek letter beta, the second letter in the Greek alphabet.

Read more at Wikipedia.org