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 The same-day rule
Wherever nouz shows a "vs previous" comparison, it picks the same day-of-week from the previous week — unless the metric is week- or month-scoped, in which case it goes back one full period.
02 Why it's 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 it shows 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 Exceptions to the rule
A few cases use period-over-period instead of day-of-week:
- 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.
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