Plain answers, no small print.
What SEVN Vital is, what it isn’t, and why it handles missing data the way it does.
Is SEVN Vital a real product?
No. SEVN Vital is a design concept by SEVNworks, an interactive demonstration of how health information could be presented across dimensions and time. It is not available to use with your own data.
Is any of this data real?
None of it. Ava, Malik and Ruth are fictional, and every measurement is generated by code from a fixed seed. The provenance page explains exactly how.
Is the index a health score?
No. It is an illustrative wellness index: a weighted average of curated synthetic dimension scores. It is not a clinical score, it hasn’t been validated against any health outcome, and it says nothing about whether anyone is healthy or at risk.
Can SEVN Vital diagnose anything or tell me what to do?
No. It never diagnoses, predicts disease risk, flags readings as abnormal, or suggests treatment or medication changes. The most it does is help you prepare questions to discuss with a clinician.
Why isn’t a missing dimension counted as zero?
Because no data isn’t bad data. Counting a missing dimension as zero would make the index fall whenever a wearable is left on the charger. Vital leaves it out of both the sum and the divisor, and shows coverage separately so you can see how much of the picture is there. See the rule.
What happens if every dimension is missing?
Vital shows Insufficient data instead of a number. It never displays an index of 0 for an empty record.
What does “stale” mean?
A dimension is stale when its latest record is older than the freshness window, 21 days by default, measured from the end of the period you’re viewing. Stale dimensions are excluded and labelled with their age. The window is a published setting you can change in the method page and the explorer.
Why are the default weights equal?
Because there’s no validated reason to rank one dimension above another for everyone. Equal weights are the most neutral starting point. You can change them in the explorer and watch each contribution update, but changing weights doesn’t make the index any more clinically meaningful.
What is a what-if scenario?
A typed-in hypothetical score for a dimension, so you can see the arithmetic effect on the index. Scenarios are stored separately from recorded history, clearly labelled, and are not predictions of what would happen if you changed your habits.
How does the summary avoid making things up?
In this concept, summaries are template-generated: fixed sentence patterns filled with numbers computed from the sample data, each citing the records it uses, and checked so that every citation resolves. A production version would use an AI model with the same factual validation against source records.
Does the site track me or store my data?
The public pages store nothing. The explorer keeps your demo settings in your own browser and resets daily at 03:00 Sydney time. Nothing is uploaded, and simulated actions like “share with clinician” only appear in a demo outbox.
Could this be built for real?
Possibly, but it would be a different project: consent, a privacy impact assessment, regulatory review, validated scoring criteria and serious security work would all come first. The data page lists what that would involve.
Who made this?
SEVNworks, a studio that designs public websites and the working systems behind them. Read about the SEVN Vital concept.
See it working
Every answer above is demonstrated in the sample view and the explorer.