10
people for an in-house round-the-clock roster
An in-house 24/7 team is not staffable for most
A round-the-clock roster with two analysts per shift quickly needs eight to ten people, on top of management, specialisms and turnover. For most mid-market organisations that is cost-prohibitive, and the talent shortage does not make it easier.
Gartner, Five Models of SOC; order of magnitude on a 24/7 roster, B.