For the system that you wrote about in Question 16.1, note down information relevant to the design factors in Fig. 16.10.

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The nature of the task that the user is carrying out The type of user The amount of training that the user will have undertaken The frequency of use The hardware and software architecture of the system Telesales system Routine task; closed solution; limited options Clerical user of the system; no discretion about use (must use it to do their job) Training provided as part of job No training provided Very frequent; taking an order every few minutes. Tourist information system for mobile PDAs and smartphones Open-ended task; may be looking for information that is not available Mini-computer, dumb terminals with text screens, keyboard data entry. All software runs on the mini- computer. Structured programs with subroutines for data access and screen-painting Could be anyone; discretion about use of system; novice in relation to this system Very occasional; may never use it again Mobile telephone screen with keypad and scroll buttons to move through menus. Browser runs on mobile PDA or smartphone HTML may be tailored to the screen size using XML and stylesheets