Making AI testing feel intuitive, visual, and human
How do you test if an AI voice agent actually feels human?
That question sparked the redesign of the Simulation experience — a system for running hundreds of simulated voice calls to identify weak spots before real-world deployment.
The existing flow felt technical and detached. I wanted it to feel alive.
Every step of the simulation — from defining personas to running tests — was redesigned around the idea of clarity through playfulness.
The new design follows a natural storytelling arc:
Create a scenario
Add caller personas
Combine data and edge cases
Run simulations and watch them come alive
Role
Product Designer, Motion Designer, QA Reviewer
Scope
UX redesign, QA documentation, and custom Lottie animation for loading states
Timeline
1 week
1. QA and Visual Consistency
Because details make or break the experience.
Before design delivery, I conducted a full QA sweep — marking visual inconsistencies, spacing issues, and color mismatches across all screens. Here are some of the issues I found:
And LOTS of other UI and UX issues!
2. Creating Scenarios
Where testing begins.
Before any simulation starts, users define what they want to test — for example, whether the agent can confirm appointment details correctly.
3. Adding Personas
Because every caller is different.
What if your AI could handle an elderly patient as gracefully as a rushed one? The Personas system made that possible.
I designed these illustrations.
4. Simulation Setup
Bringing it all together.
This view combines personas, data fields, and edge cases into one visual summary.
5. Running Simulations
Watching the AI in action.
Here’s where the magic happens. The dashboard updates live, showing how many tests are running, passed, or failed — all synced with a custom Lottie animation I created in After Effects.
Result
The new Simulation UX turned a technical tool into something anyone could use — fast, friendly, and visually coherent.
Teams could now test voice agents at scale while feeling in control of every detail.
Mursalleen, 2026