Impression and measurement usually differ
The sense that an office is quiet is formed by walking through it at particular times, which is not a reliable basis for a decision affecting the whole week. A floor that looks empty at four on a Friday may have been full on Wednesday morning, and the areas that feel deserted are often simply the ones nearest the manager's own desk.
Measurement resolves the question quickly and cheaply. Door access data, where the building provides it, gives daily counts with no effort at all. Desk booking systems give both counts and distribution across the floor. Where neither exists, a headcount taken twice a day for three weeks produces a perfectly usable picture. Any of the three is more reliable than the impression it replaces.
