Is your career "rusting out"? Here's what that means, and how to spot it.

"Rusting out" is a subtler disengagement than burnout — people still show up and do the job but feel unchallenged and lose a sense of purpose.
A Deputy survey of hourly workers in hospitality, retail, healthcare and other sectors found about 15% feel merely "OK," an early sign of rusting out.
It hurts performance when employees are underused and not developed — a good small-talk question: "Do you feel challenged at work?"