Have a Nice Trip!
Consistency is king! An interesting example of what happens when it’s not:
International Building Code: 1009.3.2 Dimensional Uniformity. Stair treads and risers shall be of uniform size and shape. The tolerance between the largest and smallest riser height or between the largest and smallest tread depth shall not exceed 0.375 inch (9.5mm) in any flight of stairs . . .