With a little digging - it's when tickets are 'created' or 'completed' in one type of project management software. (The article is basically an informal ad for

With a little digging - it's when tickets are 'created' or 'completed' in one type of project management software. (The article is basically an informal ad for Redbooth, where the blog post first appeared.) Commit times would have been a decent metric, though devs obviously vary a lot in how they structure and time their commits. But this study used ticket-completion, and finds lots of work gets done at 10-11 AM and 4 PM. Which looks suspiciously like a whole day's work has been logged during morning standup and before-leaving ticket checks.