What are the stages auto scaling goes when a scale up happens

Question

Auto scaling helps to manage most of the task that requires manual intervention. What are the stages that auto scaling has when scale up takes place?

Answer 1

There is no term such as scale up it is rather known as scale out (when increasing no of ec2 ) scale in (when reducing no of ec2)

Now talking about the stages:

There are 3 stages when a auto scaling group scales out

1. Scale out

2. Pending

3. In service