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Usability Basics

الكلية كلية تكنولوجيا المعلومات     القسم قسم شبكات المعلومات     المرحلة 2
أستاذ المادة حيدر محمد حبيب الخميس       08/04/2013 10:28:11
In general, usability refers to how well users can learn and use a product to achieve their goals and how satisfied they are with that process.

A key methodology for carrying out usability is called User-Centered Design.
What Does Usability Measure?

Usability measures the quality of a user s experience when interacting with a product or system-whether a Web site, a software application, mobile technology, or any user-operated device.

It is important to realize that usability is not a single, one-dimensional property of a user interface. Usability is a combination of factors including:

Ease of learning - How fast can a user who has never seen the user interface before learn it sufficiently well to accomplish basic tasks?
Efficiency of use - Once an experienced user has learned to use the system, how fast can he or she accomplish tasks?
Memorability - If a user has used the system before, can he or she remember enough to use it effectively the next time or does the user have to start over again learning everything?
Error frequency and severity - How often do users make errors while using the system, how serious are these errors, and how do users recover from these errors?
Subjective satisfaction - How much does the user like using the system?

User-Centered Design

User-centered design (UCD) is an approach for employing usability. It is a structured product development methodology that involves users throughout all stages of Web site development, in order to create a Web site that meets users needs. This approach considers an organization s business objectives and the user s needs, limitations, and preferences.
Importance of User-Centered Design

In order for your Web site to be successful, users must visit the site to find information or accomplish tasks. No matter what objectives you have set for your Web site, it must carefully balance the needs of users and the needs of your organization. If users don t find your Web site helpful, they will not use it.
From the business side, you can lower operating and redevelopment costs by developing a product, such as a Web site, correctly the first time around.
The Process

To create a user-centered Web site you must think about the needs of your users throughout each step in the development of your site, including:

planning your site
collecting data from users
developing prototypes
writing content
conducting usability testing with users

Creating a User-Centric Web site

The first step is to clearly define your organization and users needs, goals, and objectives. To get the project started, begin by asking yourself (and your Web development team) more detailed questions such as:

What are your agency s primary business objectives and how do they relate the Web?
Who are the users of your Web site and what are their tasks and goals?
What information and functions do your users need, and in what form do they need it?
How do users think your Web site should work and what are their experience levels with the Web site?
What hardware and software will the majority of your users use to access your site?


المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .