Table of Contents

ADR-0003: Boost overlap is strongest-wins

Status

Accepted

Context

Two boost dates can put their windows on the same day. The factors must combine. Compounding runs away quickly: two 50 percent boosts would reach 2.25 times baseline.

Decision

When multiple boosts cover a day, take the single boost with the largest absolute deviation from baseline that day. Do not sum or compound. The strongest event wins, and a suppression can override a boost.

Consequences

  • Two coincident 50 percent boosts stay at 1.5 times, not 2.25.
  • A negative boost (suppression) overrides a positive boost of smaller magnitude on the same day.
  • The behavior is unit-tested.

Alternatives considered

  • Sum the percentages. Predictable but lets overlapping events inflate volume without intent.
  • Compound the factors. Multiplies quickly and is hard to reason about.
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