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Sunday, August 31, 2008

The V-Concept of Testing - The various steps involved in V-concept are listed below:

Step 4: Test Software DesignThis step tests both external and internal design primarily through verification techniques. The testers are concerned that the design will achieve the objectives of the requirements, as well as the design being effective and efficient on the designated hardware.Step 5: Program (Build) Phase TestingThe method chosen to build the software from the internal design document will determine the type and extensiveness of tests needed. As the construction becomes more automated, less testing will be required during this phase. However, if software is constructed using the waterfall process, it is subject to error and should be verified. Experience has shown that it is significantly cheaper to identify defects during the construction phase, than through dynamic testing during the test execution step.Step 6: Execute and Record ResultsThis involves the testing of code in a dynamic state. The approach, methods, and tools specified in the test plan will be used to validate that the executable code in fact meets the stated software requirements, and the structural specifications of the design.Step 7: Acceptance TestAcceptance testing enables users to evaluate the applicability and usability of the software in performing their day-to-day job functions. This tests what the user believes the software should perform, as opposed to what the documented requirements state the software should perform.

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Step 8: Report Test ResultsTest reporting is a continuous process. It may be both oral and written. It is important that defects and concerns be reported to the appropriate parties as early as possible, so that corrections can be made at the lowest possible cost.Step 9: The Software InstallationOnce the test team has confirmed that the software is ready for production use, the ability to execute that software in a production environment should be tested. This tests the interface to operating software, related software, and operating procedures.Step 10: Test Software ChangesWhile this is shown as Step 10, in the context of performing maintenance after the software is implemented, the concept is also applicable to changes throughout the implementation process. Whenever requirements change, the test plan must change, and the impact of that change on software systems must be tested and evaluated.Step 11: Evaluate Test EffectivenessTesting improvement can best be achieved by evaluating the effectiveness of testing at the end of each software test assignment. While this assessment is primarily performed by the testers, it should involve the developers, users of the software, and quality assurance professionals if the function exists in the IT organization.