Effects of HE Fire on infantry

While thinking about and working on my HE effect table, I realized that before I can finalize said table, or even do the maths for the dice rolls, I have to determine what the possible effects are, how they come to pass, and how they interact, if at all.
My initial idea was that units can break, and broken units that re-break take losses. Added to that, units can get suppressed. However, on second thought that seems a bit weird: incurring suppression and breaking are definitely related: it is the overdose of suppression that causes a unit to break. We also want a system that requires little bookkeeping, while still keeping the detail.