Circumstancing implementation
Which requirement can be implemented through circumstancing?
1) An application routes upgrade requests for US customers to one work queue, and requests for European customers to a different work queue.
2) An application audits insurance claims that an insurance adjuster values at USD10000 or greater. Otherwise, the claim is approved.
3) An application establishes a goal of four hours to adjust claims for platinum customers. For other customers, the application establishes a goal of one business day.
4) An application sets the default shipping option for orders that exceed USD100 to two-day delivery. Otherwise, the default option is five-day delivery.
I don't fully understand what is circumstancing and when to use it. Please explain. Thanks.