A) In a sports competition management system, users must be assigned to an existing sports competition case to provide a final score. and C) In a healthcare management system, a patient's medical history is captured before processing diagnostic needs and scheduling an appointment with a specialist.

B) In an event management system, event schedule preparation involves an approval process after a monthly schedule calendar is prepared.

D) In an e-commerce platform, customers can browse products and add them to their cart prior to proceeding to the checkout and billing process.