Two lists, one document
When the porter and the night attendance are arranged separately, overlaps and gaps both appear. The porter starts doing detail work because there is time; the night crew stops checking a kitchen because the porter covers it; and a task that neither believes is theirs quietly stops happening. Putting both lists in one document prevents all three outcomes.
The document should also make the reasoning visible. A porter list built around what degrades during the day, and a night list built around what needs an empty space, gives each arrangement a clear purpose. When a new request arrives, it is then obvious which list it belongs on rather than being assigned to whoever is available first.
