If a doctor prescribed before examining you, you would leave. In marketing it is the normal way to buy. A business describes a symptom, three agencies send proposals within a fortnight, and each proposal recommends the service that agency happens to sell. Nobody has looked at the patient.
The Revenue Diagnostic exists to break that sequence. It is a separate, paid, time-boxed piece of work that ends in a written diagnosis, and it is deliberately possible to take that diagnosis and act on it without us.
What the discipline borrows from
The logic is not ours. Eliyahu Goldratt set it out in The Goal in 1984: a system's throughput is governed by its single tightest constraint, so the first of the five focusing steps is identify the constraint. Everything else is subordinate to it, and work anywhere else produces no additional output.
Revenue behaves like this. It moves through discovery, conversion, retention and expansion, sitting on top of three things that can block all four: the founder, the reputation and the offer. One of those seven is tighter than the rest. Finding out which is a two-week question, and getting it wrong is a two-quarter answer.
What actually happens in the two weeks
Four pieces of work, in order.
First, a commercial audit. Every channel the business currently grows through, what each one costs, and what each one produces in revenue rather than in activity. Most businesses have never had these numbers on one page, and a surprising share of the answers are unknown at the start of the process.
Second, constraint identification. All seven get tested against the evidence, including the three we would rather not raise. If the offer is the problem, the diagnosis says the offer is the problem, and we say so before anyone has committed a budget to promoting it.
Third, positioning and competitive review. Where the business sits in its category from the buyer's point of view, which is frequently not where the business believes it sits.
Fourth, revenue target mapping. What the number would actually require: how many customers, at what value, from which channels, by when. This is where a target sometimes turns out to be arithmetically impossible in the time available, which is a better thing to discover in week two than in month seven.
The diagnosis is worth having even if it says do not run a campaign. Especially then.
Why measurement is part of the diagnosis
A diagnosis is only useful if the business can tell afterwards whether the intervention worked, and most cannot. Bain's research on marketing measurement found that companies at the highest level of measurement maturity were four times as likely as the least mature to exceed their business goals, grow revenue and gain market share.
So part of the two weeks is spent establishing what will be measured and against what baseline. If nobody can say what the number was before, nobody will be able to argue about what it is afterwards, and the engagement ends in a disagreement about attribution rather than a result.
Why this is worth paying for separately
Three reasons, and the first is the one that matters most.
- It removes our incentive to find a problem shaped like the thing we sell. Paid separately, the diagnosis is the deliverable, and the honest answer is allowed to be that a campaign is not what you need.
- It is cheap relative to the mistake. Gartner's 2025 CMO Spend Survey found marketing budgets flat at 7.7 percent of revenue with 59 percent of leaders saying they had too little to execute their strategy. Against that, two weeks spent making sure the money lands on the right constraint is not an overhead.
- You keep it. The written diagnosis is yours whether the next step is us, another agency, or your own team.
What you get at the end
A written document naming the constraint and the evidence for it, the commercial target expressed as what it would take, the intervention we would recommend and roughly what it would involve, and the measurement baseline to judge it against.
If the recommended intervention is something we do, we will say so and scope it. If it is something we do not do, we will say that too and tell you what kind of firm to look for. That is not generosity. An engagement built on a wrong diagnosis fails slowly, expensively, and with our name on it.
What it cannot do
Two weeks of examination is not a research programme, and it is worth being clear about the limits. The diagnostic works from the evidence a business already generates, plus a small amount of primary conversation with customers and the sales team. It will not settle a question that needs a proper market study, and where that is what is required, the diagnosis says so and scopes it rather than guessing.
It also depends on honest answers. A commercial audit built on figures nobody wants to look at produces a confident diagnosis of the wrong thing. The most useful two hours of the whole process are usually the ones where somebody in the business says out loud that a channel everyone has been defending has never produced a customer.
The whole thing is designed around one principle, which is that neither of us should be guessing with your money. Two weeks is a short time to find that out. A quarter of a misdirected campaign is not.
Sources
Every figure above is linked to the study it came from. Where a finding has a specific scope, the scope is stated in the sentence that uses it.
Start with your number.
Tell us the commercial target and the deadline. We come back with the question we think needs answering first.