We introduced the idea of I/O bound and CPU bound processes, and suggested that the scheduler should maintain a good process mix. In a multiprogramming/multitasking OS what should be done in the following situations:

1.) The scheduler determines that CPU utilization is low:

2.) The scheduler determines that I/O device utilization is low:

3.) We wish to maximize throughput. :

Reference: http://www.uobabylon.edu.iq/download/M.S%202013-2014/Operating_System_Concepts,_8th_Edition%5BA4%5D.pdf