Yield per cycle gets the attention, but cycles per year moves annual output just as much. The NHB model DPR plans a minimum of six crops per room per year, using hybrids that finish in 30 days of cropping after spawn run. ICAR-DMR's model also uses six crops, at 60 days per room.
Six is reached only if compost, spawn, casing and labour arrive on the day a room is emptied and cleaned. One late compost batch costs part of a cycle.