How many people can be out before something stops running?
Who can run what
0 Can't1 Could with the written docs2 Can do it unaidedClick a cell or press Enter or Space to change it. A dashed 1 counts only after the docs are tested.
Cheapest fix for each single point of failure
One of the things the farm made at docatcdi.com. Free; it runs in your browser and sends nothing anywhere.