I am a big fan of Kanban. I wrote Kanban-Dashboards with a decent metric analysis in Filemaker Pro and in Excel. However, some features I missed there and since my workflow is moving towards Emacs I would like to track my progress there. The Keyword here is org-mode, obviously. I already can generate a decent cumulative flow diagram (Kudos to Sacha Chua!). One thing that keeps puzzling me though is how/whether I can limit the number of tasks for a given TODO-status.
Lets say, for example, that you have the Tasks TODO - DOING - DONE and would like to impose a WIP-limit on the middle-status. Is there a way so that I cannot change a task's status to "DOING" when already two tasks are on "DOING"?
Another possibility would be to show the exceeding tasks in another color - is this possible in an Agenda?