All systems should aim to achieve 99.999-percent uptime. true false

This statement ''All systems should aim to achieve 99.999-percent up time'' is false.

In reality, all systems should aim to achieve an up time of 99.99%

The different between 0.99 and 0.9999 might not seem a lot but if we actually calculate the percentage points it represents and the amount with which we need to improve efficiently, it almost becomes impossible to reach 99.9999% up time.

Is this a question? i'm confused