Handling an orderOrder placed → In stock?; In stock? → Order from supplier (no); Order from supplier → In stock? (delivered); In stock? → Take payment (yes); Take payment → Paid?; Paid? → Send a reminder (no); Send a reminder → Take payment; Paid? → Orders database (yes); Orders database → ShippedOrder placed → In stock?In stock? → Order from supplier (no)Order from supplier → In stock? (delivered)In stock? → Take payment (yes)Take payment → Paid?Paid? → Send a reminder (no)Send a reminder → Take paymentPaid? → Orders database (yes)Orders database → ShippednodeliveredyesnoyesOrder placedIn stock?Order from supplierTake paymentPaid?Send a reminderOrders databaseShipped