Describe demand by time and location
Give simultaneous users, shifts or programme breaks, hours and available bathrooms. Include people working before and after public attendance. Explain separate zones or controlled routes that could make a single restroom position unsuitable for part of the group.
Review the assumptions behind the recommendation
Discuss accessible options, washing and ongoing attention with the proposed cabin quantity. Update the business if users or available bathrooms change. The recommendation should be tied to the described use, not presented as a universal legal formula or compliance approval.
Simultaneous use, separate zones and available bathrooms
Start with the people present at one time
For events, describe simultaneous attendance, turnover, staff and the timing of breaks. For worksites, explain the largest crew, shifts and usable permanent bathrooms. A total guest list or project headcount is only a starting point. Give the rental contact the pattern of use so quantities and service can be reviewed together.
Should all shifts be added into one peak headcount?
Explain when they overlap rather than offering only a daily total. Include breaks and whether every group can use the permanent bathrooms you counted. Different work areas may create separate access needs. Ask for the proposed quantity and service assumptions together, and update the brief when the actual working pattern changes.