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Design Report Marcel Büchi Human Select Debit Account Required Computer Debit Account Choice Debit Account Select Credit Account Required Credit Account Choice Display Debit Accounts Available Debit Accounts Preferences Restrict Selection Display Credit Accounts Available Credit Accounts Credit Account Enter Amount Required Amount Allowed Limit Amount To Maximum Amount Limits Amount Currency Select Currency Required Currency Choice Display Currencies Available Currency Check Account Transfer Check Command Process Account Transfer Check Exchange Rates Transaction Failed Exchange Rate & Value Confirm Display Exchange Rate & Value Exchange Rate Exchange Rate & Value & Value Order Data Transfer Command Process Account Transfer Transaction Processed Order Transaction Failed Transaction Succeded Verify Transfer Confirmation Transfer Confirmed Display Confirmation Figure 3.2 Dataflow diagram of Account Transfer process with task allocation Displaying a quote list is a typical information retrieval task and doesn’t demand the user to enter any input because the software offers him convenient selection choices. The desired stock list is requested by tapping directly on the list name in the overview as well as choosing a security to receive more quote details. The computer handles the update mechanism and presents the financial facts according to the user preferences. Palm Banking Client 14 - 29
