The percentage of time that the CPU is busy – not idle.
The number of processes that are completed per time unit.
The sum of the time spent in the ready queue during the life of the process. Time blocked, waiting for I/O, is not part of the waiting time.
The amount of CPU time that a process will need before it either finishes or voluntarily exits the CPU, such as to wait for input / output.
The amount of time between the time a process arrives in the ready state to the time it exits the running state for the last time
The time from first submission of the process until the first running.