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Signals

Noise or signal? How to tell when the numbers mean something

Three criteria for telling a random fluctuation apart from something that has already started happening.

Published 15 November 2025 · Updated 17 May 2026

Signals · 4 min read

One fluctuation on its own is rarely a signal. Three fluctuations pointing the same way are rarely still just noise. It isn't the individual number that decides — it's whether the pattern repeats, whether you can explain it concretely, and whether it stands alone or together with something else.

Three criteria that help

  1. Does it repeat? One quarter under budget can be noise. Three quarters in a row rarely is.
  2. Can you explain it concretely? "The big customer pushed an order into next quarter" is concrete. "The industry is hard right now" or "it's the season" is rarely an explanation — it's often a way of postponing the problem.
  3. Does it stand alone? A single number falling is often a fluctuation. A number falling at the same time as two other signals — is rarely random.

What owner-CEOs typically miss

Most owner-CEOs see the fluctuation. That's not the problem. The problem is that they explain each fluctuation separately — without putting it next to the other fluctuations from the last year.

A 3 percentage point drop in renewal rates in one quarter is usually noise. The same drop in Q3, combined with rising receivables and an unexpected resignation from an experienced employee — rarely is.

The practical test

Once a quarter: write down the three or four unusual movements you've seen in the numbers. For each one — is the explanation concrete, or is it vague? And how many of them are pointing the same way?

If three are pointing in the same direction, and if two of the explanations are general, it's probably no longer a temporary fluctuation. That's often where it stops being noise.

Separate the fluctuations from the patterns

Early Warning Index helps owner-CEOs gather the fluctuations and see how many are pointing the same way.

See Early Warning Index