Venn · Diagram Design

# Good design · Desirable × Feasible × Viable

Three tests every product has to pass before it earns the word "shippable." Miss one and you get a prototype, a vaporware demo, or an internal tool nobody asked for. Coral marks the intersection worth the work.

THE HEADLINE

### One sweet spot, in coral

Three overlapping circles create seven regions. Six of them are diagnostic — they name the failure mode. Only the center earns the coral. If every region is colored, the diagram stops prioritizing anything.

### The three tests

- Desirable — someone pulls for it
- Feasible — the team can actually build it
- Viable — the economics hold up over time
- All three, or you don't ship

### The named traps

Prototype (loved, buildable, no model). Vaporware (loved, profitable, un-buildable). Internal tool (buildable, profitable, unloved). Labeling each one makes the map more useful than the center alone.