Software Testing and the V Model. What is the V Model? The V model is used to describe and present users with a better understanding of what continues throughout the software creation and testing lifecycle. Similar to the waterfall model, the V model follows the execution of its elements in a sequential manner. This method is represented in a V-shaped diagram as suggested by its name, where all development phases are parallel to the testing counterpart, it defines a logical relationship between phases, the process is balanced and is based on completion and Check each step before moving on to the next. The layout of the V model makes it quite easy to follow and understand. It works well in projects where the requirements are well understood and require minimal changes. Testing activities such as test planning and design occur early in the project life cycle. This allows testers to plan and manage their resources more effectively. It prevents defects from falling into development stages and helps identify defects at an earlier stage. Some of the main disadvantages are that this results in a less flexible structure, which does not allow many changes to be implemented after the initial requirements and specifications have been outlined, if any changes to the software design need to be implemented, all documents resulting for the previous phases must be updated. In general the V model works exceptionally well for smaller projects with well-defined specifications and ample resources available. Component Testing Component or unit testing is at a lower level in the model test hierarchy v. It is usually done by developers, since creating the test requires some programming knowledge. A... middle of the paper... absolutely necessary to choose just one, I would keep the system testing phase, the reasons for my choice are as follows:1. Most system tests and test cases are designed from the initial design and specifications in order to avail and verify that the contract requirements have been met. This means that the overall objective has been achieved.2. If the system can pass testing at this level, even though it may still contain many bugs, at least now we know that it works and does what is required.3. There are some flaws that aren't apparent until you reach this level, hence the reason for not choosing any of the above. I believe that with the right test cases, it might still be possible to reduce most of the effects caused, without going through the previous two levels of testing, since most of these defects are still detectable at this level.