Homework 2
E-shop
System
System
Order received
Check Item
availability
Items in stock?
Out of stock
Request
payment
Verify card
transaction
Generate bill
Transaction denied
Is verified?
Archive
Order sent
Payed
30 min
Canceled
Order canceled
Cancel order
After third
unsuccessful
request cancel
order
Warehouse
Warehouse
Find item Pack item Send item
Stock
It waits 30min to get info about
payment or order cancelation. If neither
of that happens system will request
payment again.
Customer
Bank
Zdeno Nekvasil,
456198
Purchase of an item in the e-shop. Checking the
availability of the item, request payment
checking the money transaction and then
generating the receipt and sending the item.
Customer can cancel order before payment.
No
Yes
Online order
Purchase approved and item sent.
Yes
Third time
Verification responseRequest for verification
Transaction deniedItem out of stock
Request paymetn
Order canceled
Payment info Order canceled
No
Result: 12