Running up and down the stairs at work, I all at once came to this deeper insight:
When deciding what height a step of a staircase should be, only going down the stairs is of importance, not up (you can quote me on this)
You can easily go up the stairs skipping each second step, but going down, skipping a step is hardly possible. It is almost impossible to run down the stairs when steps are not high enough (only taking one step goes way too slow, skipping one step doesn't work for your brain). This probably all sounds obvious but for some reason, I when I have to build a staircase, I would concentrate on elevation; not depression.
Maybe this is applicable for for areas of industrial design; leaving something is more important than entering