You shouldn't expect people to always be on time.
Rick invited some friends to eat out with him and is waiting for them at the restaurant.
Rick wants to order food for when they arrive.
Rick orders some appetizers and saves the full meal for when his friends get there.
Rick orders the full meal before his friends arrive so it will be ready once they get there.
Rick's friends are late and order what they want when they arrive.
Rick's friends are an hour late and have to eat cold food.