Glossary
Hundred-Day Echo
The Hundred-Day Echo is the operating-partner signal that fires when a frustration submission matches a cluster that already has a recorded decision. It tells the leader, in the team's own words, which of their operating decisions have not landed for the team yet.
The Hundred-Day Echo is named for the first 100 days of an operating partner or new CEO's plan, where decisions are announced quickly but their structural landing has not yet been tested by daily work. The Echo is the test.
When a fresh frustration submission clusters against a pattern that already has a Three Doors decision attached, the platform surfaces it as an Echo. The leader sees that the decision exists on paper but the team is still bumping into the architecture it was meant to fix.
Echoes are the most useful single signal in a 100-day plan because they distinguish decisions that have changed structure from decisions that have only changed slides. A high Echo rate against a Remove decision is a sign the structural change has not actually been made.
How it is measured
- Echo rate per decision: count of new submissions clustering against a pattern with an existing decision, in the 30 days following that decision.
- Echo decay: the slope of the Echo rate over time after the decision was recorded — a fast decay means the decision is landing.
Dr. Tim Hough · ISBN 979-8-9965397-1-0 · Buy the book →