In designing a general service facility, capacity should be such that the target rate of service utilization $(),$ in order to get the best general purpose design, should be:

less than $0\mathrm{.}6($or $60$ percent$),$ so that your system would be within the zone of service with maximum possible utilization.

more than $0\mathrm{.}6($or $60$ percent$)$ so that your system would have a good utilization. about $0\mathrm{.}7(70$ percent$)$ so that your system would be in the zone of service with maximum possible utilization.

more than $1\mathrm{.}0(100$ percent$)$ so that the servers are fully utilized, even if the customers had to wait a little.

between $0\mathrm{.}9(90$ percent$)$ and $1\mathrm{.}0(100$ percent$)$ so that the utilization of the system is ideal.