ECHELONS

on any command or communication channel there are always a certain number of points extending from source through relay points down to the final receipt or action point. These may be very numerous. Some may be beyond the authority of any evaluator. But each is capable of having its own situation that will cause an evaluation of the receipt or action point to fail. These can be called echelons or step like formations. The receipt or action point that is to comply finally with the program may be the subject of hidden sources of effect in the relay points of any program or order. (HCO PL 25 May 73)

one of a series of levels or grades.