Luke is spot on.
Furthermore, this ties nicely into things like MSS where "standard" evaluation paths look for this kind of relationship to determine (1) direct reports (ie. all other employees in the SAME org unit as the "chief"...which means they report to that "chief" (2) indirect reports (ie. all employees in org units BELOW the one the "chief" is in....this means those other employees (including other chiefs) usually "roll up" and also report to that chief "indirectly" ....in office speak, you will hear this as "my boss's boss" (haha). Also, a LOT of standard reports look for this set up as well.
You "can" assign your "chief" relation differently (or not at all), but you are asking for a LOT of extra work you will then have to do.