Wow, it's been a while since I blogged.  Summer is busy, busy, schockingly busy!  I wanted to mention the discussion we had recently on the kaban mailing list.  We talked about when a group using Kanban as their project management tool would conduct retrospectives.  There was talk about triggering it using timeboxes.  But Tobias mentioned the idea of a drainage buffer to trigger the retrospective.  My interpretation of this goes something like this.  As lessons learned or problems are encountered, a note is put somewhere indicating that.  When the lessons learned buffer gets filled, a retrospective is held with lessons learned best practices etc.  It's a great idea, and this allows events in the Kanban to trigger the retro, which I think is better than time boxes.  I'd love to hear if others are using this.