n The exponentially weighted averages use a = 1/2: u CPUj[i] = (1/2) Uj[i-1] + (1/2) CPUj[i-1] u GCPUk[i] = (1/2) GUk[i-1] + (1/2) GCPUk[i-1] u where F Uj[i] = processor usage by process j in interval i F GUk[i] = processor usage by group k in interval i n Recall that u Pj[i] = Bj + (1/2) CPUj[i-1] + GCPUk[i-1]/(4Wk) n The priority decreases as the process and group use the processor n With more weight Wk, group usage decreases less the priority