Case$-$Flow chart

The company follows these steps for each order:

$-$ Customer Places an Order

$-$ If payment is successful, proceed to confirmation.

$-$ If payment fails, prompt the customer to retry or select another payment method.

$-$ Order Confirmation

$-$ Confirmation email is sent, and order is forwarded to the warehouse.

$-$ If the customer chose express delivery, the order is marked as high priority, if not, regular delivery.

$-$ Inventory Check

$-$ The system checks stock availability.

$-$ If all items are available, move to packing.

$-$ If some items are unavailable, notify the customer for replacements or cancelation.

$-$ Order Packing

$-$ The warehouse staff packs the available items.

$-$ If the order is large, a second courier may need to be assigned.

$-$ Courier Assignment and Preferences

$-$ Assign a courier based on delivery location and preferences $($e$.$g$.,$ eco$-$friendly delivery$).$

$-$ If the courier is unavailable, assign to the next available option.

$-$ Order Dispatch and Tracking

$-$ The courier picks up the package, and the tracking link is sent to the customer.

$-$ Delivery Attempt

$-$ If delivery is successful, the process ends, and the customer receives a feedback

$-$ If delivery fails:

$-$ If customer reschedules, retry delivery on a new date.

$-$ If delivery fails twice, return the order to the warehouse and issue a refund.

$0$

$-$ If the customer feedback is positive, offer a loyalty reward or discount, otherwise end the process