The MOAT framework: scoring an idea on Margin, Operations, Advantage and TAM
Four dimensions, scored honestly, turn a vague 'is this good?' into a map of exactly where an idea is strong and where it's fragile.
Why four dimensions beat one gut feeling
A business idea usually fails for a specific reason, not a general one. It had no margin, or it couldn't be operated at scale, or anyone could copy it, or the market was too small. A single overall impression hides which of those is the problem. Scoring against fixed dimensions forces you to look at each separately.
The four parts
- Margin — the money left per unit after the true cost of delivering it. Thin margins forgive nothing.
- Operations — whether the thing can actually be run, staffed and delivered as it grows.
- Advantage — the reason a competitor can't simply copy you and win on price.
- TAM (total addressable market) — how big the realistic market is, not the fantasy one.
Score each out of ten and the shape of the idea appears. A 9 for advantage means little if margin is a 2; a huge TAM is worthless if operations can't scale past ten customers.
Reading the score
The lowest dimension usually decides the outcome. Fix that one, or don't start.
Bizwax's MOAT Evaluator automates this scoring and, rather than trusting one opinion, runs it past several AI models so you can see which dimensions they agree on and which they don't. But the framework works with nothing more than a notebook — the discipline is in scoring each part honestly and acting on the weakest.
Try it on your own keys
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