What I have designed for a model
Nobody stands next to a dashboard to say “here’s why the number is right.” The interface has to earn calibrated trust on its own: plain language before math, ranges before false precision, confidence stated plainly with proof one click away. That’s the design problem I’ve worked on since 2019, and I have yet to use an AI product that doesn’t have some version of it.
Ranges over point estimates
- The constraint
- One week, a scenario planner built on the model's projections, and a teammate's AI-generated mockup as the starting point. The planner was the head of product's idea, a project lead ran customer discovery with five pilot brands, and I was formally assigned the design.
- The options
- A single projected number, as the starting mockup rendered it
- A range on the headline projection
- The full statistical detail up front
- The call
A projection rendered as one number reads as a promise the model can’t keep. When the actual lands outside it, the user doesn’t conclude the estimate had variance, they conclude the product lied. A range makes the model’s uncertainty part of the message instead of a footnote. I also rejected showing the full statistical detail up front, in favour of progressive disclosure, so the first read is simple and the proof is one layer down. The range only works paired with a stated posture, which is the argument I have made since March 2025: start from “this works and we’re confident in it; if you need proof, here it is.”
- The cost
- A range is harder to act on than a single number: a stakeholder who wants a target gets a span instead. I took that trade because the alternative degrades trust the first time reality disagrees.
the Campaign Planner MVP, shipped March 2026
Draft 4 is where the argument landed. Stop restyling the statistic. The card leads with the number a marketer cares about, and the proof lives under a toggle, hidden by default: start from “this works and we’re confident in it; if you need proof, here it is, but otherwise you can trust us.” None of the gauges shipped. The posture stuck.