Accurate inventory is the difference between shipping on time and overselling stock you don't have. But how you count matters as much as whether you count. This post compares the two main approaches and explains why growing warehouses lean on cycle counting.
Physical (wall-to-wall) counts
A physical count stops operations while every SKU is counted at once — usually annually. It's thorough but blunt: you often have to pause shipping, pull staff off normal work, and you only learn about discrepancies once a year, long after the root cause happened.
Cycle counting
Cycle counting counts a small, rotating subset of inventory every day, so the whole facility is covered over a period without ever shutting down. Its big advantage is the feedback loop: when a discrepancy shows up, the receiving or putaway error that caused it is recent enough to actually fix.
A common approach is ABC cycle counting, which counts high-value "A" items most often and low-value "C" items least:
- A items (top ~20% by value): count monthly or weekly
- B items: count quarterly
- C items: count once or twice a year
Getting to 99%+ accuracy
- Count against a live system. Scanning to a WMS means counts reconcile in real time, not on a spreadsheet later.
- Investigate variances, don't just adjust them. A recurring shortfall usually traces back to a process gap.
- Make it routine. A few minutes of counting per shift beats a once-a-year fire drill.
Cycle counting turns inventory accuracy from an annual event into a daily habit — which is exactly what keeps stock reliable as order volume grows.