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In your 4‑stack, Client fit comes before Distribution fit: first “who is a great fit?”, then “where do we find more like them?”. It matches your simplification intent:Primary business focus = core job.Client subchapter = the specific kind of customer that job is best for.Target market subchapter = the ponds where those customers live (industries, geos, channels).
Your goals in business and personal lifePrimary business focusClient / ideal customer (behavioural ICP)Target market (segment/pond level)Business model
Client subchapter (Client fit)3–4 behavioural questions about the last 10–20 customers: who was great vs painful, what they did, not what they said.Capture prompt: “Our ideal client is [type] who behaves like [3–5 concrete behaviours inside our system].”Target market subchapter (Distribution fit)3–4 questions about where those ideal clients come from: industries, size, situations, channels.Capture prompt: “Our target market is [segment] in [context] who come to us when [trigger].”
Client fit (Problem–Client fit)“This is where we’ve just started: the core problem and job your business solves for a specific kind of client. That’s your primary focus and ideal client work.”Distribution market fit (Target market)“Next we’ll look at target market – the ponds you actually fish in. That’s your distribution market fit: can you reliably reach the kind of clients your business is designed for?” Model–market fit (Business model)“Then we’ll zoom out to your business model: how money, value and cost flow around those customers. That’s model–market fit: does the way you charge and deliver actually work for those clients and for you?” Team model fit (Team / building blocks)“In the next chapter, when we look at your building blocks and team, we’ll start touching team–model fit: does your organisation have the people, systems and structure to capitalise on that focus, market and model? This is similar to the O in VRIO – organisational ability to make the most of your advantages.”
Primary business focus & Customer / ICPYou’re really clarifying Client fit: what job you do and who it’s for.Target marketLight view of Distribution fit: where they are and how they show up.Business modelFirst pass at Model–market fit: does the way you make money and deliver value actually align with those people and their problems.Building Sand Castles (building blocks, Lego, stakeholder management)Early Team / organisation fit: can your house actually support the model and market you’ve described.
Client fit – are we solving a real problem for a type of client who cares?Distribution fit – can we reliably reach those clients in the real world?Model–market fit – does our pricing and delivery model actually work for them and for us?Team–model fit – do we have an organisation that can deliver on all of the above without burning out?
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Defining your business focus
I have worked on reordering the topics to flow in this chapter better.
Original
The change follows the four stack better
New order
Yes, flipping the order to Client (ideal customer) → Target market will feel more logical and more aligned with your 4‑stack.
Why client first makes sense
That way, Target market doesn’t drift into generic “who could we sell to?”; it stays “where do our best‑fit clients come from?”
Suggested order under “Defining Your Business Focus”
Then you move into Building Sand Castles (building blocks, team, etc.) as the beginning of “team–model fit”.
How to keep each tight
If you’d like, next I can draft the Client / ideal customer opening and question set, assuming it sits immediately after Primary business focus.
In client fit we will quickly start to teach the 4 Stack because it pulls the chapters together and the building blocks chapter ream model fit)
The PMF Lifecycle & 4-Fit Framework
Using the 4‑stack as a light “orienting lens” across these subchapters makes sense, especially because it gives the reader a simple way to see how their market clarity and operating model hang together. The key is exactly what you said: a small leading section that joins the dots, then you drop back into simple questions and examples rather than teaching the whole framework.
1. How to reference the 4‑stack without turning it into a lesson
You can open the next section with something like this (tweak into your voice):
“Before we zoom in on target market, customers and business model, I want to give you a simple lens I use when I’m helping clients check product–market fit. I call it the four-stack: Client fit, Distribution fit, Model fit, and Team fit.
In this book we’re not going to run a full product–market fit play; we’re going to borrow just enough of that thinking to simplify your business around the right people and the right work.”
Then one very short paragraph each:
Then a boundary sentence:
“You don’t need to memorise the four‑stack. I’m giving you just enough of it so the next few sections make sense together: who you serve, where you find them, how your model works, and whether your organisation is actually set up to deliver on that without drowning in complexity.”
That’s it. No diagrams, no 90‑day blueprint, no 150/30 rules here – those belong in workshops and later resources, not this chapter.
2. How it ties neatly to the next chapters
This gives you a clean hand‑off from “Defining Your Business Focus” into “Building Sand Castles” without readers feeling like you’ve changed topic. They see you moving down the Iceberg and across the 4‑stack at the same time.
3. Suggested short linking section (for you to adapt)
You could drop something like this at the start of the Target market subchapter or as a one‑page “bridge” between Primary focus and Target market:
A quick lens: the four market fits
“When I work with clients on product–market fit, I often use a simple four‑stack lens:
In this chapter, we’re going to borrow that lens very lightly. Your primary business focus and ideal client work sharpen Client fit. The next two sections on target market and customer give us just enough Distribution fit to simplify your operations around the right people. Then we’ll look at your business model for Model–market fit. In the next chapter, when we unpack your building blocks and team, we’ll start touching Team–model fit – your organisation’s ability to capitalise on the first three fits.
You don’t need to remember the labels. Just keep this in mind: we’re simplifying your business around the clients, markets and models that actually deserve to be at the centre of your house – so your systems and people aren’t trying to serve everything and everyone.”
That’s all you need. From there, you go straight into your tight Target market questions.
If you like, next I can draft the opening paragraph and 3–4 questions for the Target market subchapter, using this four‑stack lens but keeping it firmly in “just enough for simplification, not a PMF course” territory.
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