---
title: The most expensive thing in business might be what you think you know
description: Leaders rarely lack data. They decide on a picture of the business that has drifted from how it runs. What that gap costs, and how to close it.
image: https://www.zero-fog.com/hubfs/perspectives/zf-lesson-01-diagram.png
---

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# The most expensive thing in business might be what you think you know

Jayven Rappa · October 23, 2026

The expensive decisions I've seen weren't usually made by careless people or on bad data. They were made by capable leaders, on information that was accurate as far as it went, about an organization that no longer quite existed.

Every leadership team carries a working picture of its own business: how work flows, where money is made, what slows things down, who really decides. That picture is built from years of experience, and most of it is right. The trouble is the part that isn't, because nobody knows which part that is.

That gap, between the organization leaders believe they're running and the one that actually runs, is what I mean by fog. It isn't a shortage of information. Most companies have more data than they can use. The fog is made of assumptions that were true once, systems that each tell part of the story, habits nobody chose, and models built to answer a different question. Each one is manageable. Together they hide what matters.

## Why it's hard to see from the inside

The picture drifts quietly. Each function sees its own part of the work clearly and reports on it accurately. Those reports are rolled up, and leaders see the roll-up. Nothing in that chain is false. What it can't show are the places where the parts meet: the handoffs, the workarounds, the step only one person understands. That's usually where the real constraint sits.

The fog also hides behind competence. A plan made in the fog looks like a good plan. Every item on it is defensible. That's what makes it expensive.

![The believed version of five steps runs in a straight line. The actual version has missing details, a five-day wait, a step that loops back, one person who knows how it works, and billing in a spreadsheet.](https://www.zero-fog.com/hs-fs/hubfs/perspectives/zf-lesson-01-diagram.png?width=760&height=319&name=zf-lesson-01-diagram.png)

*Decisions get made on the top line. Results come from the bottom one.*

## What it looks like

A mid-sized broker-dealer I worked with had a clear list of four problems, one for each of its core systems, and a sensible plan to fix them one at a time. When we followed a typical advisor's week, three of the four problems turned out to be the same constraint seen from different seats. Nobody had made a mistake. The list followed the systems, and the constraint sat between them.

The costly thing wasn't the problem itself. It was confidence in a picture nobody had tested, and a plan to fix four things one at a time when three of them were the same problem.

## The discipline

Not more data, a bigger dashboard or another offsite. What helps is a discipline, and it's simpler than it sounds:

- **Separate what you know from what you've inherited.** Before a consequential decision, write down the handful of things it depends on being true. Next to each, note how you know it: measured recently, seen firsthand, or carried forward from how things used to be.
- **Look at the work, not the report about the work.** Spend time with the people who do it and watch where it actually waits and gets redone. It's slower than a meeting and much faster than a failed program.
- **Put it in your own numbers.** A finding that can't be expressed in money, risk or time rarely changes a decision. One that can usually does.
- **Agree on the picture before arguing about the answer.** Many leadership debates are two accurate, partial pictures colliding. Get to one shared picture first, and the decision tends to get easier.

## A test for this week

Take the biggest decision on your calendar and list the five things it depends on being true. If more than one or two of them come down to "that's how it's always worked," the decision is being made in the fog, and the cheapest time to find out is before you make it.

That's the idea behind this series. Over the next few months I'll look at where the fog tends to settle: in operating models, in metrics, in technology, in transformation programs and in how organizations learn. None of it is an argument that the tools are wrong. Org charts, dashboards, process maps and AI are all useful. The fog usually lives between them.

*Lessons from the Fog is a series on where capable organizations lose sight of how they really work, and the disciplines that bring it back into view.*

**Facing a consequential decision?**

A 30-minute conversation about the decision ahead, whether it fits, and what a first cycle would cover.

[Talk to us](https://www.zero-fog.com/contact)

## Read on

[![](https://www.zero-fog.com/hubfs/How%20We%20Pressure-Test%20Execution%20Systems%20Before%20Pushing%20Them%20Into%20Production.png) Jan 27, 2026How We Pressure-Test Execution Systems Before Pushing Them Into Production](https://www.zero-fog.com/zero-fog/how-we-pressure-test-execution-systems-before-pushing-them-into-production) [![](https://www.zero-fog.com/hubfs/Yellow%20White%20Black%20Simple%20Minimalist%20Why%20Youre%20Feeling%20Stuck%20Linkedin%20Carousel.jpg) Aug 27, 2025The 3 Hidden Execution Gaps Costing PE Firms Millions](https://www.zero-fog.com/zero-fog/the-3-hidden-execution-gaps-costing-pe-firms-millions) [![](https://www.zero-fog.com/hubfs/Black%20and%20Yellow%20Best%20Hotels%20Newsroom%20LinkedIn%20Post.jpg) Aug 12, 2025Execution: The Untapped Alpha in Private Equity.](https://www.zero-fog.com/zero-fog/execution-the-untapped-alpha-in-private-equity)

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