"Erratic performance" refers to inconsistent or unpredictable behavior or results. It implies that someone or something is not performing consistently or meeting expectations in a stable manner.
Sentences with «erratic performance»
A one - year pitcher whose cost and erratic performances made him unpopular on the trade market, then. (sbnation.com)
Your vehicle could suffer erratic performance, poor gas mileage, and even complete engine shutdown. (austinchevroletservice.com)
I'll choose slightly erratic performance over physical discomfort any day. (tomsguide.com)