As an example, a complex of six actual towers may have the first trio of towers be assigned Towers 1, 2, 3 and the second trio Towers 5, 6 and 7. The same may occur for large projects that have four or more phases of development.
As an example, a collection of six actual towers could be labeled as Towers 1, 2, 3 in the first group and Towers 5, 6, 7 in the second group. The same applies to substantial projects that have four or more stages of development.