User-Centred Requirements Handbook |
This section describes the interaction steps required to carry out key tasks defined by the task scenarios.
Process
1. List each Task Scenario in a copy of Form 3.3 below.
2. In the left hand column list the task steps to be performed.
3. In the right hand column write, for each task step, the interaction required.
Form 3.3 - Task Scenarios and Interaction Steps (Example)
| 3.3 Task Scenarios and Interaction Steps | |
| System: Bank machine | |
| Scenario: S2(1) The user inserts the card and enters the PIN. They request £200, when the limit is £50. | |
| Transfer from Form 2.3 Task scenarios and Form 2.4 New processes | PRI: 2 ACH: * |
| User | System |
| User identifies themselves by inserting card. | System reads card, whichever way card inserted and displays message prompt. |
| User types PIN or presses finger on fingerprint pad. | If recognised, system displays options. |
| User selects 'withdraw cash'. | System displays maximum amount that can be withdrawn and possible amounts. |
| User selects or enters amount up to the maximum. | System responds that cash is ready to be dispensed and displays menu of other services. |
| User selects 'exit from system'. | System returns card and dispenses cash. |
Screen printouts from the prototype system will help to illustrate these sequences.