This read-write value sets the percentage of the ingress service rate that this connection is expected to utilize, a figure fed into the switch's connection admission control calculations. It lets the admission-control algorithm reserve resources based on expected rather than worst-case usage, affecting whether new connections can be admitted onto an already-loaded interface. An admin provisioning a connection known to run well below its PCR most of the time might set a lower bbChanIngrPercentUtil to allow admission control to admit more connections onto the same interface.