APO determines the block out time and in this case, every 0.5 seconds. At a given time, the production of each block will only be granted to a block producer. If a block fails to be produced within the specified time, the block at that specific time will be skipped. In the APO system, 126 blocks will be generated per round (each block producer produces 6 blocks, multiplied by 21 block producers). 21 independent block producers will be voted by APO holders. If a block producer misses a block in production or does not produce any block within 24 hours, they will be removed from the block producers until they announce their intention to re-produce blocks to the entire network again.