Following the calendar rather than the week
An office that is used on three days does not need five attendances, but the three it needs have to be the right ones. Servicing on a Monday when the office was last used on Friday means the space sits soiled through the weekend and is cleaned before a day it will not be used. Placing attendances immediately after use rather than before it is the basic correction.
The same logic applies to evening activity. A room used for a group session on a Thursday night should be serviced before it is used again, not on the following Monday because that is when the cleaner normally attends. Once the attendance days are chosen from the actual calendar, the pattern usually turns out to be simpler than the standard one it replaces.
