Observed and inferred numbers

Most numbers are read directly#

A number with no marker was mostly read directly, as of the page's check. That's most of what you see. We don't decorate every number with its source: the plain ones are the ones you can take as read.

Some are filled in, and say so#

Some values are filled in rather than read at each store. Where we can stand behind them, we show them and mark them inferred. On a total, that means more than half of the stores behind it weren't read directly; on one store's value, that store's wasn't.

Coles, Woolworths and ALDI set their prices by zone: a group of stores shares one price. We read each zone's price and give it to every store in the zone. Those prices aren't marked, because nearly all of them are filled in this way; the page says it once instead, in a line such as "Coles, Woolworths and ALDI price by zone: each store has its zone's price." IGA is read store by store, so a filled-in IGA value is still marked.

Read an inferred number as reliable, but not first-hand. If a decision turns on one store, check that store's own row in Stores.

Some we don't know, and say so#

Where we can't stand behind a value, we don't show one. You'll see "—", unknown, or a count apart, such as "ranging not read at 234 more". We never fold "we don't know" into "no": a store whose ranging we haven't read is never counted as not ranged.

Why we don't show estimates#

Some numbers would be useful but aren't shown, such as estimated units sold. We only add a number once it holds up. A number in Cannonball is one you can put in front of a buyer.