alt Hacker NewsThe fundamental idea behind Kanban was WIP Constraint Management.
Unfortunately, so many people have been doing cargo-cult agile for so long that now the word "kanban" means 'task board with columns' to most people.
It should not be possible to put 200 items into a column on a Kanban board unless the team is actually shown to have the capacity to work on them without causing a bottleneck.
"WIP" does not work - it only seems that you are in control of the process. It may work for the same type of tasks (hammering a nail), but in my practice, where all tasks are different, it did not work anywhere.