A method you can explain is a method you own
If understanding your own numbers depends on a vendor being reachable, you are renting comprehension along with the software.
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By Joris van Huët, Founder & CEOUpdated 3 min read
If understanding your own numbers depends on a vendor being available, you are renting comprehension along with the software. That dependency is invisible until the vendor is not available.
Three moments where it lands
| Moment | What happens if only the vendor understands the method |
|---|---|
| A budget meeting goes badly | You cannot answer the follow-up without a support ticket |
| You switch tools | Nothing transfers, because the understanding was never yours |
| A number looks wrong | You cannot triage it yourself |
The triage case is the frequent one
Something in the numbers moves and you need to know whether it is real. The order is: was the move smaller than the interval, did coverage move at the same time, did anyone change a definition, and only then did something change in your marketing.
Waiting for a vendor to run it takes days, and by then the meeting has happened. The full triage is in what a real-time alert is actually detecting.
What "understanding the method" actually requires
Less than people expect. Four things: what goes in, what the estimate is compared against, why the interval is the width it is, and what the method refuses to measure. Four sentences, and they transfer to any tool you use afterwards, which is what makes them worth learning once.
That is knowledge you keep, unlike a settings screen.
Why vendors sometimes prefer you not to have it
Not usually deliberately. A method nobody outside can explain is a method that produces support dependency, and support dependency looks like engagement in a product review. Nobody sets out to build it; it accumulates when documentation is treated as optional.
The buyer-side response is to require the documentation before purchase, which is covered in asking for the methodology before you buy.
What we try to make portable
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The test of whether you own it
Explain your measurement approach to a colleague in two minutes, without opening the tool. If you cannot, the understanding is still the vendor's, and that is worth fixing before the next budget meeting rather than during it.
Related answers
Frequently asked questions
Why does understanding the method matter if the tool works?
Because you need it in three moments: when a budget meeting produces a follow-up question, when you switch tools and nothing transfers, and when a number looks wrong and you need to triage it yourself in minutes rather than days.What do I actually need to understand?
Four things: what goes in, what the estimate is compared against, why the interval is the width it is, and what the method refuses to measure. Those four transfer to any tool, which is why they are worth learning once.How do I check whether I own my method?
Explain your measurement approach to a colleague in two minutes without opening the tool. If you cannot, the understanding still belongs to the vendor, which is worth fixing before the next budget meeting rather than during it.
Go deeper: Incrementality testing, explained.
Sixty-second versions of these ideas: Causality Engine on YouTube Shorts.
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Terms in this article
- Ad SpendAd Spend is the total amount invested in advertising campaigns. It is measured against Return on Ad Spend (ROAS) to evaluate campaign effectiveness.
- AttributionAttribution identifies user actions that contribute to a desired outcome and assigns value to each. It reveals which marketing touchpoints drive conversions.