Notes Acknowledgments The ideas for this book come from the theoretical and practical work I have been doing for the last ten years. None of that work has been done alone. As a result, the list of people to whom I am indebted makes Oscar night acknowledgments look haiku-terse by comparison.
Web Usability 4 Summary: How to define usability?
How, when, and where to improve it? Why should you care? Overview defines key usability concepts and answers basic questions. What — Definition of Usability Usability is a quality attribute that assesses how easy user interfaces are to use.
The word "usability" also refers to methods for improving ease-of-use during the design process. Usability is defined by 5 quality components: How easy is it for users to accomplish basic tasks the first time they encounter the design? Once users have learned the design, how quickly can they perform tasks?
When users return to the design after a period of not using it, how easily can they reestablish proficiency? How many errors do users make, how severe are these errors, and how easily can they recover from the errors? How pleasant is it to use the design?
There are many other important quality attributes. Does it do what users need? Usability and utility are equally important and together determine whether something is useful: If a website is difficult to use, people leave. If users get lost on a website, they leave.
Note a pattern here? There are plenty of other websites available; leaving is the first line of defense when users encounter a difficulty. For intranets, usability is a matter of employee productivity. Time users waste being lost on your intranet or pondering difficult instructions is money you waste by paying them to be at work without getting work done.
For software and physical products, the improvements are typically smaller — but still substantial — when you emphasize usability in the design process. For internal design projects, think of doubling usability as cutting training budgets in half and doubling the number of transactions employees perform per hour.
For external designs, think of doubling sales, doubling the number of registered users or customer leads, or doubling whatever other KPI key performance indicator motivated your design project.
How to Improve Usability There are many methods for studying usability, but the most basic and useful is user testing, which has 3 components: Get hold of some representative userssuch as customers for an ecommerce site or employees for an intranet in the latter case, they should work outside your department.
Ask the users to perform representative tasks with the design. Observe what the users do, where they succeed, and where they have difficulties with the user interface. Shut up and let the users do the talking. If you help them or direct their attention to any particular part of the screen, you have contaminated the test results.
Iterative design is the best way to increase the quality of user experience. The more versions and interface ideas you test with users, the better. User testing is different from focus groupswhich are a poor way of evaluating design usability. Focus groups have a place in market research, but to evaluate interaction designs you must closely observe individual users as they perform tasks with the user interface.
Listening to what people say is misleading: When to Work on Usability Usability plays a role in each stage of the design process. The resulting need for multiple studies is one reason I recommend making individual studies fast and cheap. Here are the main steps: Before starting the new designtest the old design to identify the good parts that you should keep or emphasize, and the bad parts that give users trouble.esl instruction and related educational issues November 5, ♦ Tenth Anniversary Statement, continued • This entry is in continuation of the project launched on October 1 — the production of a set of theoretical “guidelines” to provide a sort of foundation for the whole site.
As the human population grows, it is ever more important to decrease our levels of consuming and harvesting materials from the earth and its ecosphere. James Boyle The Public Domain Enclosing the Commons of the Mind.
Copyright © by James Boyle. The author has made this online version available under a Creative. Harbours and sea works: Harbours and sea works, any part of a body of water and the manmade structures surrounding it that sufficiently shelters a vessel from wind, waves, and currents, enabling safe anchorage or the discharge and loading of cargo and passengers.
The construction of harbours and sea works offers some of. A hospital is a health care institution providing patient treatment with specialized medical and nursing staff and medical equipment.
The best-known type of hospital is the general hospital, which typically has an emergency department to treat urgent health problems ranging from fire and accident victims to a heart attack.A district hospital typically is the major health care facility in its.
The color coding can help you determine the viability of an aircraft/power-system combination. See Making Use of the Color Coding for more details.. On an in-flight analysis, the top of the window also has a line giving predicted performance statistics.