Several bars, one stocktake
Each bar is an area within the venue. Different people can count different areas at the same time on their own phones, and the results consolidate into a single variance and GP view.
Fast counts either side of a weekend
Run a Friday opening count and a Sunday closing count. Approve comparable counts, then check that the weekend’s receipts, sales mappings, waste and transfers are complete before relying on the variance.
Where late-venue shrinkage shows up
Per-bar, per-product variance separates the bar with a training problem from the bar with a counting problem — a distinction a venue-wide figure hides.