Transfer processing moves an absence from full pay to half pay and then nil pay on trigger points measured over a rolling year. The occupational scheme and the statutory scheme (statutory sick pay, maternity, paternity, adoption, shared parental leave, parental bereavement leave, jury service) meet at that transfer.
Three checks apply there. The system's rolling year should match the policy's. Full-time equivalent should be calculated as the policy intends for part-time and irregular working patterns. Letter automation should fire from the same trigger as the pay change. When the policy changes, one definition is updated and the other is not.