Which is a real-world example of a procedure?

Go out to get some milk

Explanation:

Almost anything we do in life is framed in a procedure, from making popcorn, to driving a car, to pay for the bus, to go out to get some milk, but we don't think about those in everyday life, because we are so used to them that we do them instinctively. Anything that implies doing specific actions in a specific order to obtain a specific result.

Procedure to get milk

Verify if you wear appropriate clothes to go outside

- If not, dress properly

Go out of your house (lots of mini procedures included here, like go to the door, open the door, get out, close and lock the door behind you, and so on)

Go to the store

Find milk in the shelf and take it to the cash registry

Pay for the milk

Go back home

Re-enter the house

Undress if necessary

Put milk in the fridge.

More obvious examples could be the fire emergency procedure or the pre-lift off check list for a plane.