Final answer:
It is a good idea to increase multi-programming when CPU utilization is low during I/O to better utilize idle CPU cycles, thus improving overall system utilization and efficiency.
Step-by-step explanation:
The question you've asked pertains to the concept of utilization of CPU resources in the context of multi-programming. When CPU utilization is low during input/output (I/O) operations, it can be a good idea to increase multi-programming. This means that the operating system can load more processes into memory, which can then be switched to quickly by the CPU when one process gets blocked for I/O. This strategy is aimed at improving utilization of idle CPU cycles by having more tasks ready to execute, thus reducing the time the CPU spends idle and thereby improving overall system efficiency and throughput.