Graduated application testing allows for continuous product improvement, while you build your system.
Whole system testing is conducted on a complete, integrated system to evaluate the system’s compliance in the context of your requirements.
The intention in both cases is to find any errors, defects and security threats. Is your software functional, is it usable, is it secure? And, are these functions fulfilled correctly within the framework of your business specifications?
Test cycles allow for the fact that bug fixing is an iterative process, meaning, when one bug is fixed, it can cause new issues or uncover previously hidden problems.
The end result: Functional software, robust integration and a secure platform.