Granted, the drop hedcq is bad grammar, but it works for the military and it could – most likely would – work for any organization.
The military is very big on roll calls and knowing who is present and who is absent – in the latter case, also why the person is absent.
The military roll call is done in reverse pyramid fashion.
On the bottom is the squad. This can be maybe 4 to 10 people.
Next is the platoon. A platoon is composed of several squads.
Moving on up there are companies, each having several platoons; then – well, the graphic shows it all.