Is an induction always scheduled ?

Sorry this is my first pregnancy and I was curious to know. I don’t know if I’m having one yet BUT just wanted to know if an induction is always scheduled or can it happen the same day? For example I’m 40 weeks pregnant today and I’m seeing my doctor on Monday she said she won’t let me go pass Monday, is it possible if I MIGHT get induced that it will be that day ? Or how does it usually work ? I’m aware that every doctor and every pregnancy is different. The scheduling part is my only question if anyone can answer that tyia.