Routine frequency against current occupancy
The first question is whether the office is being used as it was when the schedule was set. Headcount, attendance patterns, the use of particular floors or zones, and whether visitors come to the premises all change over a year, sometimes substantially. A frequency set against last year's occupancy will be either generous or inadequate somewhere in the tenancy.
The evidence needed for this is usually already available somewhere in the business. Consumable usage, waste volumes, where complaints have actually occurred and any occupancy data the business already holds will answer the question fairly quickly. What matters is comparing those figures against the assumptions the schedule was originally built on, which requires those assumptions to have been written down in the first place.
