The testing activity ends when the testing team completes the following milestones.
Test case execution
The successful completion of a full test cycle after the final bug fix marks the end of the testing phase.
Testing deadline
The end date of the validation stage also declares the closure of the validation if no critical or high-priority defects remain in the system.
Code Coverage(CC) ratio
It is the amount of code concealed via automated tests. If the team achieves the intended level of code coverage (CC) ratio, then it can choose to end the validation.
Mean Time Between Failure (MTBF) rate
Mean time between failure (MTBF) refers to the average amount of time that a device or product functions before failing. This unit of measurement includes only operational time between failures and does not include repair times, assuming the item is repaired and begins functioning again. MTBF figures are often used to project how likely a single unit is to fail within a certain period of time