The number of test participants for qualitative usability testing that optimizes return-on-investment is determined by 2 parameters: the facilitator's observational skills and the design team's speed when generating the next design iteration.
UX professionals often receive poorly defined design requests. When saying no is not an option, a more productive way of addressing the request is to focus on the outcome goals and the Return On Investment (ROI) of proper UX effort.
The UX profession has grown substantially since 1950 everywhere in the world. Even so, the expected growth until 2050 will dwarf anything we’ve seen so far.
Quality assurance impacts the user experience: when things don’t work, users question their understanding and develop superstitions and inefficient workarounds.
Simple user testing with 5 participants, paper prototyping, and heuristic evaluation offer a cheap, fast, and early focus on usability, as well as many rounds of iterative design.
The average business metrics improvement after a usability redesign is now 83%. This is substantially less than 6 years ago, but ROI remains high because usability is still cheap relative to gains.
Computing the net present value (NPV) lets you estimate the most profitable level of usability investment. For big projects, expensive usability can pay off.
Several usability findings lead directly to higher sales and increased customer loyalty. These design tactics should be your first priority when updating your website.
Although the gains don't fall into traditional profit columns, there are clear arguments for improving usability of non-commercial websites and intranets. In one example, a state agency could get an ROI of 22,000% by fixing a basic usability problem.
Development projects should spend 10% of their budget on usability. Following a usability redesign, websites increase desired metrics by 135% on average; intranets improve slightly less.
Across 50 teams, the average time needed for their first usability test of a website was 39 hours. The average site had 11 usability catastrophes that prevented users from completing their tasks.
