Turn Order Script?

[PhotonWeapon]

Maybe I'm just dumb, but could anyone tell me what is going on in this part of Scene_Battle:

#--------------------------------------------------------------------------
  # * Make Action Orders
  #--------------------------------------------------------------------------
  def make_action_orders
    # Initialize @action_battlers array
    @action_battlers = []
    # Add enemy to @action_battlers array
    for enemy in $game_troop.enemies
      @action_battlers.push(enemy)
    end
    # Add actor to @action_battlers array
    for actor in $game_party.actors
      @action_battlers.push(actor)
    end
    # Decide action speed for all
    for battler in @action_battlers
      battler.make_action_speed
    end
    # Line up action speed in order from greatest to least
    @action_battlers.sort! {|a,b|
      b.current_action.speed - a.current_action.speed }
  end

I'm guessing the first couple lines must be putting active (i.e. in-party, non-dead) enemies and players into the array but I don't get much the rest. How is the DBS determining the turn order here?

I'm just curious because I'd want to do a similar turn order in a custom script, or find some easier way to do so.

 

[sandgolem]

for battler in @action_battlers
battler.make_action_speed
end

It picks a random + based on stats number and it's considered the battler's "turn". It's a 1 line command in Game_Battler 1

# Line up action speed in order from greatest to least
@action_battlers.sort! {|a,b|
b.current_action.speed - a.current_action.speed }

That sorts the action/battlers afterwards. They are then in their turn order

 

[PhotonWeapon]

I found that 1 line command in Game_Battler 1:

#--------------------------------------------------------------------------
  # * Determine Action Speed
  #--------------------------------------------------------------------------
  def make_action_speed
    @current_action.speed = agi + rand(10 + agi / 4)
  end

So if I got this right... Say Basil has 62 Agility... So it'd be 62 + rand(10 + 62 / 4)... Or, 62 + a random number between 0-26 (25.5 rounded up); I think that's how rand works. That means his action speed can range from 62-88?

EDIT: I'll assume from the silence that means yes. All righty, then! Thanks for that post, Sandgolem. No, I'm not being sarcastic.