The APDEX Performance Score

How to Interpret an APDEX Score

Your applications are rated from 0% to 100%:

• 0%–70%: the application provides a poor user experience for being slow
• 70%–85%: the application provides a fair user experience for being fairly slow
• 85%–100%: the application provides a good user experience, since it's fast

If there is no data about an application, OutSystems displays a hyphen (-).

How an APDEX Score is Calculated

Each time the end-user navigates to a page in your application, OutSystems checks how long the page took to load. If the page loads in:

• More than 8 seconds: it provides a poor user experience, because it's slow
• 2–8 seconds: it provides a fair user experience, because it's fairly slow
• Less than 2 seconds: it provides a good user experience, because it's fast

To calculate the APDEX score of an application, we use the following formula:

This scores an application with:

• 0% if all page loads were slow, i.e. took more than 8 seconds
• 50% if all page loads were fairly slow, i.e. took between 2 and 8 seconds
• 100% if all page loads were fast, i.e. took less than 2 seconds

You can learn more about this industry standard at www.apdex.org.