ABC ranking for a shop that sells both bread and brass fittings
When one back room holds groceries and hardware, a single ABC ranking lies. Rank inside categories, or the bread will always look ‘A’ and the slow elbow will hide a second problem.
ABC ranking sorts SKUs by how much they contribute to sales or to margin, then spends counting labour on the top slice. In a single-category warehouse it is a decent way to decide which bays get a weekly count. In a mixed Georgian shop — bread and milk in front, brass fittings and paint in the back — a single ranking is a lie.
Why a single list fails
Bread turns every day. A brass elbow may turn twice a year and still be the reason a tradesman comes in. If you rank the whole back room together, bread and milk eat the A list, the elbow falls to C, and you under-count the fitting until a Saturday complaint. You also over-count bread, which you already see empty with your eyes.
Rank inside the category
We draw two (or three) ABC pictures: groceries, hardware, perhaps a small third for whatever else lives in the loft. Each has its own A slice. The cycle-count map then gives weekly labour to grocery A and hardware A, not to a blended fiction.
Margin is allowed to argue with takings
A cheap bun can be A on takings and poor on margin. A slow imported varnish can be C on takings and worth protecting because it is the only tin in the district. We will mark both facts. The owner still chooses which labour to spend. The sheets refuse to hide the varnish behind the buns.
What this changes on the floor
Pickers already know the mixed shop is two shops. The ranking should admit it. When we pin a cycle-count roster, the hardware cage has its own weekday, even if the till loves bread. That is inventory planning for the room you actually have, not for a textbook warehouse that sells one kind of carton.