iSQI CPUX-F Exam Dumps

Answer B is better than answer A. If you have the resources to usability test with 20 users, start by testing with for example 5 users, then correct the most critical problems and test again with another 5 users. Answer F is not optimal because Tour team members are sceptical towards usability.'

Primary user

A user who uses the interactive system for its intended purpose.

Examples of primary users:

1. A bank customer who uses a cash dispenser to withdraw money is a primary user of the cash dispenser.

2. A call centre operative who uses a reservation system to reserve cars for customers is a primary user of the reservation system.

Secondary user

A user who carries out support tasks with the interactive system, for example to maintain it or to train primary users.

Note: 1.

Secondary users - in particular maintenance staff - typically interact with a different user interface than primary users. This user interface also requires context analysis and specification of user requirements to be usable.

Examples of secondary users:

1. A user who prints a document on a printer is a primary user of the printer. When the same user a moment later changes the ink on the printer, he or she is a secondary user of the printer.

2. A bank employee who restocks a cash dispenser with cash is a secondary user of the cash dispenser.

3. A trainer who teaches a call centre operative how to use a car reservation system is a secondary user of the reservation system.

Indirect user

A user who uses the output of the interactive system, but who does not interact directly with the interactive system.

Examples of indirect users:

1. A bank customer who receives a paper or electronic statement is an indirect user of the bank's computer system.

2. A customer who contacts the call centre to reserve a car is an indirect user of the computer system used by the call centre operative to make the reservation

Dialogue principles and user interface guidelines are rules, of varying levels of specificity, used to guide the design of the interaction (see section 6). They are intended to make the interaction effective, efficient and satisfying, to avoid common usability problems and to ensure a consistent user interface.

Dialogue principles and heuristics are general guidance for the design of usable dialogues. There are seven dialogue principles; examples of dialogue principles are conformity with user expectations and error tolerance. Dialogue principles are not bound to any specific technology or method.

The concepts of affordance and mental model supplement the dialogue principles. Affordance is an aspect of an object that makes it obvious how the object could be used. A mental model is the perception people have of themselves and of the things with which they interact.