An On-Call Rota You Can Defend ONCALL
Somebody swaps a week, then another. Eighteen months later one person has had four Christmases and nobody can say how, because the sheet only ever showed this quarter.
The period
Who is in it
The generator is deterministic: the same people, dates and blackouts always give the same rota. A rota that can be reproduced can be defended; one that came out of a shuffle nobody can repeat cannot.
The weeks
How it falls
The rota, written out
Questions people ask about ONCALL