All Xface design projects follow a user-centred design (UCD) approach. It's a well-established way of creating successful interactive products, based on principles from design, psychology and software engineering. UCD offers remarkable business benefits including stronger sales and reduced risk.

We follow the following principles in all our projects :

• Usefulness - product enables user to achieve their goals - the tasks that it was designed to carry out and/or wants needs of user.
• Effectiveness (ease of use) - quantitatively measured by speed of performance or error rate and is tied to a percentage of users.
• Learnability - user's ability to operate the system to some defined level of competence after some predetermined period of training. Also, refers to ability for infrequent users to relearn the system.
• Attitude (likeability) - user's perceptions, feelings and opinions of the product, usually captured through both written and oral communication.