Approval system?

I am asking this question out of sheer curiosity.
How can one add an approval bar in a game using playmaker?
By approval bar I mean
For example the player is doing a mission for a NPC and he successfully completes it he will get approval and if he leaves the mission in the middle or doesn't do mission a for a amount of time he will lose approval and if the approval bar increases to a certain amount NPCs will help the player in certain task and if it decreases to a limit NPCs will start to attack the player.
Thanks in advance!!!

 

Love/Hate?

 

Pretty much like that. But how do you do it yourself using playmaker. I just want to know how it works. And not individual relationships but in a more general way. Something like a collective approval bar.