Some Usability Quotes.
1. Websites must be easy to use. Hard to use sites frustrate customers, forfeit revenue to online retailers, and erode the image of the company's brand.
Source of quote Manning, McCarthy, & Souza, 1998.
2. In one survey, 28% of Web shoppers had trouble finding the product they wanted and 62% of Web shoppers gave up looking for a product on line.
Source of quote Seminerio, 1998.
3. 44% of websites users do not succeed in finishing their purchase on e business websites.
Source of quote Nielsen, 2001.
4. E commerce sites lose almost half of their potential sales because users cannot use the site. In other words, with better usability, the average site could increase its current sales by 79%.
Source of quote Nielsen, 2001.
5. The average software program has 40 design flaws that impair employees' ability to use it. The cost in lost productivity is up to 720%.
Source of quote Landauer, 1995.
6. 80% of maintenance is due to unmet or unforeseen user requirements. Only 20% is due to bugs or reliability problems.
Source of quote Pressman, 1992.
7. 80% of all software development costs occur after the product has been released.
Source of quote Karat, 1993.