Chapter 1 — Meet GoodDay Foods
A sales decline is visible. What caused it is not.
Advanced course
Sales are down. That tells you what happened. Not why.
Do you know what is causing the decline — or do you only have a theory?
Follow GoodDay Foods as several reasonable explanations emerge and the team learns to use evidence to distinguish between them before deciding what to do.


Work through possible explanations for a sales decline, identify the evidence that can help distinguish between them, build a working diagnosis supported by the available evidence and see how that diagnosis changes the response.
Instead of moving straight from a falling number to a solution, learn to separate what happened from why it may have happened, and test the explanation against the available evidence before acting.
Seven chapters follow the team as it stops jumping to solutions and starts working out what may be causing the decline, what the evidence supports and how to respond.
A sales decline is visible. What caused it is not.
See how quickly a business can move from a visible decline to familiar actions before understanding the underlying problem.
Explore why plausible professional answers are not enough when different explanations could lead to very different responses.
Change the question from “What should we do?” to “What might explain what we are seeing?” and begin a more disciplined diagnostic process.
Use evidence to test competing explanations instead of using it to defend the team’s preferred answer.
See how a better-supported diagnosis changes the response and where the business should focus its effort.
Turn the reasoning into a practical way to structure future situations.
The course shows the situation.
The Course Companion explains how to work through this kind of problem.
The Companion moves beyond GoodDay Foods.
It looks at the same type of situation more generally: the result is visible, the cause is not yet clear and several possible actions are competing for attention.
It explains how to separate the result from possible explanations, decide what evidence matters, form a working diagnosis and respond without pretending that every question has already been answered.
It helps you use the same approach when the result is clear but the explanation is not.
7 chapter PDFs + Course Companion + Read Me First
The course uses a visual, slide-style PDF format designed primarily for laptop, desktop or tablet. Mobile reading is also possible.
See how the course actually works before you buy it.
Chapter 1 is the actual opening of the course. It introduces GoodDay Foods and the central situation: sales are down, but the cause is not yet known.
It also lets you experience the course’s visual style, language and way of explaining ideas.
You do not need to enter an email address to download it.

80 USD + applicable tax
Continue to Gumroad. The final amount, including any applicable tax, is shown before payment.