This is neat, and I could see it potentially being a useful way to categorize and organize e-mail, though I personally find e-mail clients that allow for deferral/scheduling sufficient for my needs.
However this trend of using lean and Toyota production system terminology to sell stuff that has no real relationship to it is starting to get tired.
None of these card column systems has any real relationship to the Kanban process outside of the use of cards. The similarities tend to end at a completely superficial level.
Rule #1 of Kanban is that it is a "pull" system. By design e-mail is push. It would also be difficult to limit work-in-progress here, which is another cornerstone feature of a Kanban system.
However this trend of using lean and Toyota production system terminology to sell stuff that has no real relationship to it is starting to get tired.
None of these card column systems has any real relationship to the Kanban process outside of the use of cards. The similarities tend to end at a completely superficial level.
https://en.wikipedia.org/wiki/Kanban
Rule #1 of Kanban is that it is a "pull" system. By design e-mail is push. It would also be difficult to limit work-in-progress here, which is another cornerstone feature of a Kanban system.