Two boundaries can be defined—a threshold of representation is the minimum vote share that might yield a party a seat (under the most favorable circumstances for the party) while the threshold of exclusion is the maximum vote share that could be insufficient to yield a seat (under the least favorable circumstances).
Mogu se definirati dvije granice - prag zastupljenosti je minimalni udio glasova koji bi stranci mogao dati mjesto (pod najpovoljnijim okolnostima za stranku), dok je prag isključenja maksimalni udio glasova koji bi mogao biti nedovoljan za postizanje mandata (pod najmanje povoljnim okolnostima).