What is cpu schedule criteria?

the cpu schedule criteria include : CPUutilization, Throughput, Turnaround time,Waiting time,Response time.

what are the CPU burst time and I/O burst time ?

This time is both the CPU time and the I/O time. The CPU time is the time taken by CPU to execute the process. While the I/O time is the time taken by the process to perform some I/O operation. In general, we ignore the I/O time and we consider only the CPU time for a process. So, Burst time is the total time taken by the process for its execution on the CPU.