If you're reconfiguring the shower and adding a heated floor, schedule additional weeks for waterproofing, floor leveling

https://wiki-nest.win/index.php/Why_Some_Gilbert_Bathrooms_Develop_Cracked_Tile_After_Remodeling

If you're reconfiguring the shower and adding a heated flooring, timetable additional weeks for waterproofing, floor leveling, and accuracy tile work.