Create a use case diagram for an online shopping platform :
1. A customer creates an order. The customer can then add or delete items to or from the order, respectively.
2. An order is submitted with the customer's name, address and the form of payment (bank transfer, credit card or cash). A submitted order also includes the ordered items and their quantities, and the price, weight and dimension (cubic volume) of each item.
3. Upon receiving an order, the order processing staff will arrange the distribution of goods and formulate a delivery plan. The delivery date and delivery requirements (e.g. express delivery, safe packaging, proof of delivery) will also be specified in the delivery plan.
4. Dispatchers receive the orders from the order processing staff. A dispatcher then delivers the goods to the delivery address. When the customers receive the goods, they need to sign a delivery slip.
5. Once the delivery slip was received, the order processing staff reconfirms the delivery with the customer.
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