Overview

The usability score is a combination of 8 different metrics, each weighted based on importance, used to measure the usability of a website. Practitioners might apply it differently based on their needs and preferences. It is best used to measure the change in a site’s usability as new designs are implemented.

I developed a spreadsheet for calculating the usability score.

User Sentiment Survey Data

Perceived Usability

Perceived usability is a subjective sentiment score. Its purpose is to capture users’ first impressions of the website. This places importance on the aesthetic-usability effect. Users perceive aesthetically pleasing design as design that’s more usable. I use a simple question to capture this measurement, “Based on your experience, how would you rate the site's usability?” I use a 10-point scale to make this score easy to convert to a percentage:

Enjoyment

Enjoyment is a subjective sentiment score. Its purpose is to capture how much users enjoy using the website. This places importance on empowering the users and thus driving higher engagement. After having users interact with various experiences in the website, I use a simple question to capture this measurement, “Based on your experience, how enjoyable was the site?” Again, I use a 10-point scale to make this score easy to convert into a percentage:

Usability Testing Results