Faction Tiers
Factions vary in tier depending on their size. Smaller factions will typically hover between tier 1 and tier 5, while larger, galaxy-spanning factions might reach tier 20. Higher tiers require more active members, but grant greater benefits to them, as shown in the Faction Benefits table on page ---.
Proficiency Bonus
Factions have their own proficiency bonus, which scales with their tier. This proficiency bonus affects actions that faction takes as a whole, or actions taken by members of appropriate rank, in the ability scores in which the faction is proficient.
Ability Scores
Ability scores represent what a faction choose to focus on for its enterprises. Their are six ability scores: Strength, Dexterity, Constitution, Intelligence, Wisdom, and Charisma. Ability scores are discussed at greater length in Chapter 4: Using Ability Scores.