A couple of years ago, Joost wrote:
consider breaking the competency down a bit further by creating children of it that are linked to the individual activities, and marking the parent competency complete when all children are completed. This can be done by adding a competency rule to the parent competency from the competency frameworks administration section (Edit competency framework).
Can someone explain how to do this? In that discussion there is a link to a page that doesn't exist and a reference to the "docs" but no explanation of what the docs are and how to get there.