"3× pipeline" is folklore. Your real coverage ratio is 1 ÷ win rate. Compute what you actually need.
Required pipeline = quota ÷ win rate. Required deals = required pipeline ÷ average deal size. Your coverage ratio = current pipeline ÷ quota; the target ratio = 1 ÷ win rate. A 25% win rate means every $1 of quota needs $4 of pipeline — before slippage.