Lesson 3 · Metric grain

Can Koru's recognized-revenue event be sliced by SKU?

A metric has a declared grain. A dimension that matches it one row at a time can be used as-is. A dimension that matches multiple rows creates fanout.

Recognized-revenue grain

RR-204

Order: KE-204
Buyer: B-17
Revenue: $420

One event. One row.

B-17

Alder Trading

Consumer goods

1 matching row. The event stays 1 × $420.

OL-1

qty 1

trail-pack

OL-2

qty 1

field-jacket

OL-3

qty 1

ridge-bottle

3 matching rows. The event cannot truthfully become three SKU-level revenue values without an allocation rule.