Peaks are predictable more often than people expect
Public-facing offices tend to have a rhythm that anyone working there could describe from memory but that nobody has written down. Payment deadlines, enrolment periods, seasonal programmes, the weeks either side of a public holiday and reporting cut-offs all produce a measurable rise in foot traffic. Once listed, they turn out to occupy a predictable set of weeks rather than being random surges.
Writing them into the schedule changes the conversation from reactive to planned. Instead of an office manager phoning to ask for something extra during the busiest week of the year, the schedule already says what happens and the cleaner already knows. The cost is agreed at the start of the year rather than negotiated at the point of greatest inconvenience for everybody.
