The layout preferences of the design professional should be well defined for each space prior to bidding. If a layout is not provided by the design professional prior to bidding, the tile contractor may, of necessity, determine the layout based on the space, tiles, and pattern specified.
-TCNA Handbook 2021
It is very important to consider all options when it comes to how your tile will be installed; some ambiguous ideas might not work with certain patterns or grout joints. For example, if the grout joint alignment from floor to wall is desired, the design professional must confirm the suitability of such based on actual tiles to be installed. If the grout joint alignment cannot be accommodated with the actual tiles, the tile contractor may, by necessity, reasonably adjust the pattern.