| name | rank-multi-unit |
| description | Rank comparable units against each other, normalized for format and daypart, to find where the margin actually is. Reach for this on a portfolio review. |
Skill: Rank multi-unit variance
The chain average hides the money; the best-vs-worst spread reveals it.
Step 1 — Normalize the comparison
Group units by format/daypart so the comparison is apples-to-apples (§3 #7).
Step 2 — Rank on prime cost and margin
Order units on prime cost and four-wall margin within each group.
Step 3 — Isolate the spread
Quantify best-vs-worst and attribute it to operations, not format.
Step 4 — Prescribe to the laggards
Map the top quartile's practices to the bottom.
Output
A normalized store ranking, the best-vs-worst spread, and a laggard improvement plan.