I'm currently using org-mode to clock all my work related working time. This
#+BEGIN: clocktable :block thisweek :scope agenda :link t :tags t :match "WORK" :step day :stepskip0 1 :fileskip0 1
mostly does, what I want. However, I'd like to keep track of the difference between working time and the amount of time I was supposed to work.
My idea was to have recurring daily tasks with a certain tag for the average daily working time. To make this idea work, I'd have to automatically clock in for each of those days with a negative amount of time. Apparently that does not work, since in the clock table, negative times are not considered.
Another approach would be to keep track of the desired working time and then to just manipulate the Total time to negatively add those entries. Can this easily be done?