I am using this formula and everything looks okay but the text that shows up for "Delivered Early" is showing up in the field as 0Delivered Early. I don't know why.
=IF([Days Late / Early]3 > 0, "Delivered Late") + IF([Days Late / Early]3 = 0, "Delivered On Time") + IF([Days Late / Early]3 < 0, "Delivered Early")