Why plan specialist time rather than embed specialists?#
Because there are not enough of them, and embedding them leaves them idle in some teams and missing from others. Planning their decision time makes a shared bottleneck visible that counting agents would hide — the queue for the one security architect does not appear in any measure of machine capacity.
Why does the brief matter so much here?#
Because specialist time is the scarcest input in the system, and an unprepared question consumes it twice: once to establish the context and once to answer. A prepared brief, in the form a decision queue item takes, is what makes the service work at all.