When every SKU must be counted in one marathon session, fatigue shows up in the data: mis-scans, duplicated lines, and “just fix it later” adjustments. Breaking work into aisles or categories reduces error rates more than doubling headcount.
Start with your highest-velocity items and the SKUs that caused the last stock argument. If those numbers are trustworthy, finance and operations arguments get quieter.
Use transfers and adjustments as teaching moments: a pattern of shrink in one category is often a process problem, not theft by default. Good inventory software makes the trail visible; managers still have to act on the pattern.
BillDiary ties catalog structure to the same engine as billing, which helps counts reconcile to what actually sold—but the counting cadence is still a management choice. Choose smaller wins over heroic weekends.