Function is_queue_stable 

pub fn is_queue_stable(utilization: f64) -> bool

Whether a queue is stable: utilization strictly less than 1.0.

A queue at or above 100% utilization has, in practice, unboundedly growing wait time, because real arrivals are uneven rather than perfectly smooth. Wait time grows sharply, not gradually, as utilization approaches this threshold — treat utilization consistently near 1.0 as an early warning, not just outright instability as the only concern.

Arguments

• utilization — the resource’s utilization as a fraction (see utilization).

Returns

true if utilization < 1.0 (stable), false otherwise.

Examples

use software_engineering::queueing_theory::is_queue_stable;

assert!(is_queue_stable(0.9));
assert!(!is_queue_stable(1.0));
assert!(!is_queue_stable(1.1));