The operating schedule suggests the best band to be running on, hour by hour, based on expected propagation and analysis of the logs of past winners.
Limit is six band changes per clock hour.
Run ops must remember that QSO count must be balanced against a diversity of multipliers on all bands. Watches mult progress on the various bands on the mult station computer and tunes and uses packet and Internet sources to find unworked multipliers. Notifies the run op of unworked mults on the run band, and the run op will attempt to work them. If the rate is high, the run op will ask the multi op to make the QSO, avoiding simultaneous transmission. Multi station works mults on non-run band, avoiding simultaneous transmission.