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Usability Usability is the “effectiveness, efficiency and satisfaction with which a specified set of users can achieve a specified set of tasks in a particular environment.” – International Standards Organization
A Usable product
Is easy to learn.
Is hard to forget.
Anticipates and forgives mistakes.
Does what the user wants and when the user wants it.
Focus on maintenance, improvement and the next project.
Reduce time / budget lost to
Revision to changes.
Usability and its value Business – If your users don’t understand how to use something, they may get frustrated and use someone else’s. If some part of your business makes life difficult for them, you can bet they’ll make business difficult for you. Success – Success is likely if you create an offering that delights your intended audience. The only way to achieve delighted users is to create what they want and in a form that they find intuitive. Return – Solutions that match the needs of the user can dramatically improve customer satisfaction , which in turn translates into increased revenue and customer loyalty. Investment – Studies show that for every dollar a company invests in developing usable software, the company receives $10 - $100 in benefit and wins customer satisfaction and loyalty too. Other studies show that 80 % of maintenance costs are spent on unforeseen user requirements, and only 20 % are due to failures
Usability improvements can be quantified by measuring
Its always better to design something right to begin with rather than fixing it later. Building usability into your process can
Reduce development costs.
Reduce development time
Improve the end product
Case study – egreetings.com When Egreetings first launched, they displayed only a few of their most popular top level hierarchies visible, the rest in a pull down. There was a severe drop down in visits to the home page.