The previous article showed why a hand-picked threshold schedule is only an approximation, and that doing it properly means solving a correlation-aware boundary. Most teams don't want to derive that boundary from scratch every time they plan an experiment. This article is the reference table: precomputed, verified boundaries for the interim schedules teams actually use in practice.
What's in This Playbook
Four common interim schedules, crossed with three spending function styles, for twelve total cases...