Different Environments (DEV, Test, Production)

Development (DEV) Environment

The DEV environment is where developers write and initially test their code. It changes frequently and is generally unstable, as new code is constantly being added.

Test/QA Environment

The Test (QA) environment is a more stable, controlled environment set up specifically for the QA team to execute formal test cases against builds that have already passed initial developer checks.

Staging Environment

The Staging environment closely mirrors production and is used for final verification, including UAT and performance testing, before release.

Production Environment

The Production environment is the live environment used by real end users. Extreme care is taken here, since any issue directly impacts customers.

Why Separate Environments Matter

Maintaining distinct environments prevents unstable, in-progress code from affecting real users, and allows testing to happen safely and thoroughly before each release.