THE DECISION QUALITY BRIEF•ISSUE 03•17 Aug 2026

A strong score can be evidence of the wrong thing

By Dr. Eva-Marie Muller-Stuler

1. One Decision

2. One Illusion (The False-Confidence Pattern)

Benchmark Theatre: optimizing for public leaderboards that leak target features or ignore decision-time latency constraints.

3. One Piece of Evidence

An internal evaluation showing 98% accuracy was discovered to contain customer churn status recorded three days after the churn event had occurred.

4. One Minimum Production Bar

All evaluation must be performed on time-partitioned holdout datasets with audited decision-time feature availability.

5. One Question to Take to Your Team

"Was our evaluation tested on the raw production data pipeline, or on an artificially cleaned historical slice?"

NEXT OPERATIONAL STEP

Verify whether your team's evidence satisfies this week's production bar.