Attribution methods
Time Decay Field Notes
Field-style course on half-life choices, decay curves, and how decay interacts with seasonality.
¥73,000 informational
4 weeks async + 2 live clinics · Async lab blocks
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Narrative
Participants keep a decay journal while running provided datasets. Coaches annotate where decay assumptions hide channel politics.
Included modules
- Decay journal framework
- Seasonality overlay exercises
- Heatmaps for half-life sensitivity
- Stakeholder memo templates
- Lightning critiques on real anonymized decks
- Office hours on retail calendar quirks
- Async peer review swap
Outcomes
- Pick a defensible half-life range with documented rationale.
- Pair decay outputs with qualitative launch timelines.
- Run a sensitivity sweep that leadership can skim in five minutes.
Responsible mentor
Ren Yamane
Attribution mentor specializing in retail and seasonal cohorts.
Participant questions
Sheets plus our hosted notebook environment—no local installs required.
Experience notes
Sapporo operator here—the decay journal is nerdy and helpful; my seasonal category finally has language for why Q3 looks “weird”.