Why periodic work is the easiest thing to lose
Routine tasks are self-policing. If the bins are not emptied, someone notices by nine in the morning. Periodic tasks have no such feedback. High dusting on a ceiling void, the underside of a bench, the inside of a light diffuser, the back of a fridge unit in a staff kitchen. All of those could be skipped for a full cycle and nobody in the building would be able to say for certain either way.
That is not an argument that they are being skipped. It is an argument that the arrangement should not rely on trust in either direction. A client who cannot verify periodic work will eventually stop believing in it, and a crew that gets no acknowledgement for work nobody sees will eventually deprioritise it. Evidence solves both problems at once and it costs very little to produce.
