The GTM Lexicon: eight terms, defined the way I use them.

Theory of Constraints (in GTM)

The Theory of Constraints is Eliyahu Goldratt's operations principle: a system's output is set by its tightest bottleneck, so effort anywhere else is largely wasted. Applied to go-to-market it is a way of ordering the work. Instead of asking “what could we improve?”, which produces a list of twenty ideas, the question becomes “what is capping throughput right now?”, which produces a decision. The honest caveat: a real motion rarely has one single constraint, and the answer is often a piece that was never built rather than a stage that underperforms.

GTM diagnostic

A GTM diagnostic is a structured reading of your entire go-to-market, from strategy and demand generation through sales execution to customer success and pricing, that ends in a short list of what is capping growth and what each item costs, rather than a list of observations. The test of a good diagnostic is falsifiability: it should state which competing explanations it considered and why it rejected them, in writing. At Caugia it is not a product: the first weeks of an engagement go to reading the motion with your team, and the plan comes out of that reading.

Revenue leak

The revenue leak is what the current motion loses per year where it is capped: deals that stall and die, pipeline that never forms, customers who churn avoidably, prices that undersell the value delivered. Put in euros, from your own numbers, so the cost of the problem can sit next to the cost of fixing it in the same board conversation. Most teams find their biggest leak is not where they thought it was.

Cost of inaction

The cost of inaction is the revenue leak expressed per month of waiting: what leaving the leak open costs between now and whenever it gets fixed. It exists because “we will look at this next quarter” sounds free and is not. Putting a monthly number on the delay is usually what moves a diagnosis from interesting to funded.

Gate

A gate is a measurable release condition between phases of a plan: the next phase does not unlock until the gate clears. Gates keep a plan honest. Without them, execution drifts into activity reporting, where everything is 80% done forever. With them, the plan either demonstrates that the fix is working or forces the conversation about why it is not, while there is still time to adjust.

AI Answer Market (GEO/AEO)

The AI Answer Market is the layer where your buyers now start: they ask ChatGPT, Claude, Gemini, Perplexity, Grok or Mistral before they ever reach your website. Generative engine optimization (GEO), also called answer engine optimization (AEO), is the discipline of being the answer those engines give when your category is the question. It belongs in any reading of a go-to-market, because a diagnosis that ignores where buying decisions begin is incomplete.

Fractional GTM leadership

Fractional GTM leadership means a senior operator embedded inside your company one to three days a week, running the fix rather than advising on it. It exists for teams that need the seniority of a CRO-level hire without the full-time seat. At Caugia the operator is me, Tom Meijer, capacity is capped at two engagements at a time, and the work is reviewed weekly against the number agreed up front. What working together looks like.

Weekly GTM review

The weekly GTM review is the forty-five-minute session that holds an engagement together, on the same day every week: what moved, what we stop or scale, who owns what next, against the number agreed up front. It stays in the team's tools, and the team keeps holding it after the engagement ends.