The job is not finished when the van leaves.
A lift stops, a resident reports damp, a sensor drops out. Residention turns the report into work on a named asset, measures response, attendance, fix and acceptance as four separate clocks, and keeps the job open until evidence arrives.
Reactive work is where portfolios lose money quietly. The same fault is attended four times because nobody linked the visits. A contractor closes a job on their own system and the client learns about it at invoice time. A service level is reported as met because one clock was measured and the other three were not.
Residention holds the whole loop on one record: the report, the asset, the dispatch, the attendance, the parts, the evidence and the acceptance — with the difference between each state kept visible instead of collapsed into "closed".