Testing and validation of all changes introduced in the Development System during the Design and Build Phase. In this system the authorizations are to be restricted. Every program which is developed in development ssytem is tested on sample data present in the QA system and only if the program passes all the tests then it is transported to production system.
- All correction necessitated by the testing need to be done in the Development environment and retested in the System Test environment
- No Changes can be permitted in the System Test/QA environment
- The testing carried out can be Functional Test, Integration Test, User Acceptance testing
- This system can also serve as the Training environment
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