While looking at the project math board I realized the there are two types of colums.
- column 1-4 organize the tasks into their state of completation
- the columns n>4 are topical categorizations indepenendent of the completation of the project.
However, these two aspects are orthogonal, and thus many tickets fit into two columns, at least. I would not want to delete the information in columns n>4 because the tasks groups help to get an overview of the more than 300 tasks in the project.