The count is the easy half
Walking the shelf and writing numbers is straightforward. The work is what happens next: taking each difference and deciding what caused it. A business that counts diligently and reconciles lazily gets a tidy record and learns nothing, and the same variance appears at the next count.
Cycle counting beats the annual blitz
The annual full count is a day of lost production that produces a snapshot which is already stale by the following week. Cycle counting — a handful of items every week, weighted toward high-value and fast-moving stock — costs almost nothing per session and keeps the record continuously close to reality.
It also finds problems while the cause is still recent enough to identify. A variance discovered eleven months after it happened is unexplainable by definition.
The usual causes of variance, in rough order
- Unrecorded transfers between the shop and vehicles.
- Material consumed on a job and never issued against it.
- Receiving errors — quantity entered as ordered rather than as delivered.
- Unit-of-measure confusion: boxes counted as pieces, rolls as feet.
- Damage and waste written off nowhere.
- Theft, which is real but far less common than the five above.
Freeze the location while you count
If material moves in or out mid-count, the resulting variance is partly real and partly an artefact of timing, and there is no way afterwards to separate them. Counting a location during a quiet window — before the shop opens, after the last van is loaded — costs nothing and removes the ambiguity.
Adjust with a reason, always
The final step of a count is an adjustment that brings the record to reality, and it should carry the reason discovered during reconciliation. The reasons accumulate into the most useful inventory report a service business has: a ranked list of where the process is leaking.
If most reasons come back as 'unknown', that is itself the finding. It means movement is happening outside the record, and no amount of counting will fix a recording problem.