If a 'Daylight Zone' does not qualify, the advice in the documentation toolkit on this website suggests reducing the SF of the floor area in the equation until you can determine the area that is compliant. As Melissa commented above, this does nothing to make the overall results of the room as a whole better or worse, and neither does splitting the room into bays. Either way, you will have to include the regularly occupied space square footage that qualifies and does not qualify and end up with the same percentage.
If you want to determine the exact area that complies in a room, I found using the following formula works when the VLT x WFR is less than .15:
Qualifying Floor Area= (Total Room Window Area) / (.15/Tvis)
Divide your qualifying floor area by the total room floor area, and you have your percentage of daylit space for that room. Keep in mind this only works for rooms where VLT x WFR are less than .18; I haven't figured out how to determine compliance in that case... Suggestions??