Name the broad capability
Start with the general area you're tempted to build all at once.
VERTICAL SLICE DESIGNER
Feature Slice Designer
Break a broad capability into a small vertical slice that's usable end to end, with a leanness score for how thin the slice really is.
- Uses your inputs in a transparent calculation
- Instant result with practical next steps
- No signup required
Planning guidance only. Validate important decisions with customer evidence and your delivery team.
YOUR INPUTS
Build your result
Complete every field. The result updates only when you choose Calculate.
How it works
Find the narrowest valuable case
The smallest version that still delivers real value to a real user.
Exclude variants explicitly
Naming what's excluded prevents scope creep during the actual build.
Continue learning: Choosing an MVP prioritisation method · Which assumptions should your MVP validate first?
Frequently asked questions
What is a vertical slice?
A thin but complete implementation of a capability — touching every layer needed, but only for the narrowest use case, rather than building each layer fully for every case.
How do I know if my slice is thin enough?
If you can't clearly name at least two excluded variants, it's probably still too broad.
What if the slice depends on something unbuilt?
It's not a true vertical slice yet — either build that dependency into the slice or find a narrower one that doesn't need it.
How We Compare
| Feature | MVPHub | Miro | Notion |
|---|---|---|---|
| End-to-end usability check | Included | Not included | Not included |
| Explicit exclusion tracking | Included | Not included | Not included |
| No-signup instant result | Included | Not included | Not included |
| Instant leanness score | Included | Not included | Not included |
Miro and Notion host the resulting slice documentation. MVPHub scores how thin and shippable a candidate slice actually is first.
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