The media/health care people are using misleading terms.
For our schools we have:
an outbreak of two or more cases
but are only under “watch” status with five or more cases.
Personally, I would do it the opposite.
1 or 2 cases, the school/business/etc should be considered under a “covid watch”.
It should be declared an “outbreak” with 5 or more cases.
Not the other way around like it is.