What are the most commonly used test strategies for upgrade projects?
There are three main strategies based on testing practices followed in different software development methodologies. The test process is fairly consistent across the different strategies, but the test planning and the test effort varies for these strategies, which are: • Test Strategy Based on the Waterfall Methodology: In this strategy, after a single project of the entire application is upgraded, the upgraded project is unit tested. Then after all projects of the application are upgraded, all the upgraded projects/components are integrated to get a working version of the application, which is then system tested for functional equivalence. • Test Strategy Based on the Iterative Methodology: This test strategy overcomes the shortcomings of the waterfall-based test strategy and is best used in complete upgrade projects for complex applications and for staged upgrade projects. In a staged upgrade strategy, each project/component is upgraded and is integrated with the system. The system c
