Performance - evaluated using Lighthouse in Chrome Developer Tools

Encryption (TLS) - certificates validity and TLS configuration are evaluated using testssl.sh (GitHub)

SecurityHeaders.com - Checks for missing HTTP security headers in website responses using the tool at https://securityheaders.com/. This is somewhat outdated and mostly superseded by the Mozilla security headers metric.

webbkoll.dataskydd.net - evaluated using Webbkoll, an online tool that simulates a normal browser visit and checks for potential privacy problems.

Checkmk provides a score based on the data from checkmk server regarding downtimes.

Uptime (30 days) - this metrics gives 100 if the site is never found down/unresponsive within the checks performed under the last 30 days period. Uptime data gathered using https://uptimerobot.com/

Server Errors (7 days) per visit - aggregation of the number of server-side errors/exception received in Sentry from the website, divided by the total number of website visits as logged by Matomo.

Test coverage - code quality metric that is computed based on the results of tests ran in Jenkins using the SonarQube scanner. Coverage is computed from all the SonarQube Projects that have the url as a tag and are ending with '-master'. The score is the division between the sum of all covered lines and the sum of total lines.