osprey

compare period over period for trend questions

every tile shows a delta vs the same length window before. up 18% week-over-week tells a different story than flat. the deltas are how you spot real changes from noise.

3 steps~2 min
  1. 1

    pick a short period for short-term questions

    this week vs last week is the right comparison for "is the new offer working."

  2. 2

    pick a longer period for stability questions

    last 90 vs the previous 90 is the right comparison for "is the business growing."

  3. 3

    small swings are noise

    a 3% swing is rarely a story. a 30% swing is. focus your time on the latter — that's where there's something to either celebrate or fix.

    tip

    track the same number across eight weeks to see whether a change you made is actually working. one week of data is noise; eight weeks tells you something real.

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