zlacker

>>behnam+(OP)
In my head I usually do "an order of magnitude" increase to do things properly. 1h to 1d to 1w to 1M to 1Y.

Thats kind of like a multiplier of τ=2π

>>janto+6b
....that's not an order of magnitude each time

>>porb12+Ib
a calendar "order of magnitude". I can't think of a better term.

>>janto+ac
Perhaps “up a unit of measurement”?

>>powers+Ic
This is what I was taught: double the estimate, and increase to the next unit. It was mostly as a joke, though.

The wise scheme, as has been pointed out, is to adjust predictions during a project. If the task that was initially planned to take a day is routinely taking 2 days (or 2 hours), adjust future plans accordingly.

Higher-level managers are sometimes unhappy with this scheme, while middle-level ones value the accuracy of such predictor-corrector schemes.

This gets us into a related topic of the depth of management structures, and I think the military scheme (of each person directing a roughly fixed number of persons, so the number of levels is proportional to the log of workforce size) might be worth considering.