How do I classify the severity of any error or bug I encounter?

How do I classify the severity of any error or bug I encounter?

If you encounter an error or a bug in the software, please report it to the support desk.

You will be asked to describe the severity of the problem. The table below will help you to decide which of the following to use:
CRITICAL; MAJOR; MINOR or LOW.

Severity

Impact

Degree of impact

% of users affected

Critical

All users cannot access the system and are unable to perform a significant part of their intended tasks.

The failure affects all users

Major

Access to the system is slow or limited. Users are unable to perform a significant part of their intended tasks.

The failure affects a large number of users

Minor

Users are unable to perform a small proportion of their intended tasks but most others can be completed normally.

The failure affects a small number of users

Low

Users are enquiring about the system but there is no impact on its quality, function or performance.

No users are affected