Retention problems rarely appear suddenly. In most stores, the warning signs are visible earlier in repeat purchase timing, order intervals, and cohort behavior.
One of the most useful signals is recency drift. If repeat customers are taking longer to place the next order, that is often an early sign of weakening engagement.
Another useful signal is cohort decay. If newer customer groups are returning at a lower rate than earlier cohorts, the acquisition pipeline may be pulling lower-quality demand.
You should also compare retention by product mix. Some products naturally support repeat behavior better than others, and that difference matters when analyzing growth quality.
The operational advantage comes from noticing these changes early. Once repeat purchase rate drops materially, recovery usually becomes more expensive.