Testing is the most crucial component of the application development cycle. It is what ensures that the platform is all that has been expected of it and works exactly as anticipated. To go through this Testing process, such as building Test suites or the Test cases is the largest component of the activity. The challenge is to anticipate and build the all-encompassing test cases / suites. Sometimes the Test cases could be deficient of its coverage or lack structure to it appropriately. All of these could compromise the quality of Testing. To address this the process, you would have to do testing over testing.

In general, the development of test suites, especially for legacy platforms is very costly and tedious, and because it normally requires manual laborious work which can take up much time and possibly cause errors during execution, this can increase a project's cost. Testing efforts are greater than half the total costs associated with system modernizations. This usually hinders the modernization process, as well as slows down development processes.