The same-day-of-week comparison is a small detail with huge implications for how you read your numbers. Once you internalise it, "yesterday vs today" comparisons stop making sense.
01 What is the same-day comparison rule?
Wherever nouz shows a "vs previous" comparison, it picks the same day-of-week from the previous week — so this Tuesday is measured against last Tuesday, never against Monday or yesterday. The only exception is when the metric is week- or month-scoped, in which case nouz goes back one full period instead. This keeps every comparison like-for-like, which is the only honest way to read retail numbers.
02 Why is same-day comparison more useful?
A Saturday and a Wednesday are different businesses. Comparing them tells you nothing useful — only that weekends are different. Comparing today to the same day last week tells you something real: are like-for-like conditions improving or not?
03 Where does this comparison show up?
- Home tile chip — today vs same day last week.
- KPI strip chips — this period vs previous equivalent period.
- Statistics insights — peak/weak detection uses day-of-week medians, not running averages.
04 What are the exceptions to the rule?
A few cases use period-over-period instead of day-of-week. Week-level comparisons match full weeks (Mon–Sun) rather than Tuesday vs Tuesday. The monthly P&L chip compares against the same calendar month last year when available, otherwise the previous month. And year totals compare against the previous year rather than an equivalent day. Each exception is listed below.
- Week-level comparisons. "This week vs last week" compares full weeks (Mon-Sun), not Tuesday vs Tuesday.
- Monthly P&L chip. Compares against the same calendar month previous year (when available) or previous month.
- Year totals. Compare against the previous year, not the equivalent day.
Was this article helpful?
Your vote helps us decide what to write next.